Forum menu
Leadville 100 MTB
 

Leadville 100 MTB

Posts: 7513
Free Member
 

Incidentally yes diamox (acetazolamide) is on the banned list, but not because it will aid performance, more as masking agent.


 
Posted : 21/05/2025 9:05 am
Posts: 4202
Full Member
Topic starter
 

Thought I would give an update on training/equipment/diet progress.

Training is going well - averaging around 12 hours per week. Just come of the back of a recovery week and gained another 1% (noise really) on the FTP so up to 334w at sea level. On Saturday I wanted to a do a fuelling practice ride so did a 4 hours ride taking in 3 Precision 30g gels per hour. This worked well and for the last hour I changed them to caffeine gels. I pushed hard for the ride which isnt easy with the local roads (lots of short sharp hills which mean surges and then coasting). I ended up with a average power 207w and a NP of 227. It was an OF of 0.71 so right where i want to be for Leadville (adjusted for altitude). There was a nice 12 mile low gradient gravel hill that I was able to push hard on and got some nice momentum. Overall I ended up with 105 km, 25.8 kph average (which is pretty decent on a MTB with gravel tyres) and 1400m of elevation gain.

Weight wise I am now down to 179lbs as of this morning which means I have hit my goal weight. If I can squeeze a little more out of it then I will but as long as I maintain that I will be happy. This puts me at 4.1 w/kg which means I can shoot for a sub 9 time. If I dont make it I wont be too sad but this gives me lee way to at least buckle for the event (sub 12 hour).

Bike wise - the bike is in good condition. I need to swap out the rear wheel bearing and will also change jockey wheels (or just the bearings) and the bottom bracket which has started creaking. A few minor adjustments on the controls as well but that is it.

The next 3 weeks of specialty phase are key as after that there are only a few more weeks but I feel like I would be in a good place if we started the race today.

 

IMG_2910.jpeg


 
Posted : 17/06/2025 10:20 am
dander, MoreCashThanDash, beej and 2 people reacted
 beej
Posts: 4214
Full Member
 

Great update - sounds like you've really worked at getting into shape for this and preparing as well as possible. 2 months to go?


 
Posted : 17/06/2025 11:42 am
Posts: 4202
Full Member
Topic starter
 

Yeh - it is the 9th of August. With any adaptations normally taking a few weeks to show in your fitness this block will put the icing on the cake and then it is holding the fitness for three weeks and making sure I am as fresh as I can be 


 
Posted : 17/06/2025 11:58 am
Posts: 9597
Free Member
 

A chap I used to work with went out for this a couple of times. He did say the alitiude and heat was the hardest thing to prep for. 3000 - 3800m up will make riding feel tough. I find as soon as I'm over 2000 to 2500m it becomes really obvious. FWIW "Climb high, sleep low" as the climbers say - if you have 6 days before go up as high as you can in the day time but sleep as low as you can for adaptation and recovery. PS you know Diamox is a diuretic, right? (and altitude is dehydrating on its own).


 
Posted : 17/06/2025 2:30 pm
Posts: 33189
Full Member
 

Nice shot of Parsley Hay where the trails split/meet?


 
Posted : 17/06/2025 3:07 pm
Posts: 4202
Full Member
Topic starter
 

@morecashthandash Yep - was a nice morning for a ride up there - only saw 3 other people


 
Posted : 17/06/2025 3:22 pm
Posts: 33189
Full Member
 

Posted by: robbo1234biking

@morecashthandash Yep - was a nice morning for a ride up there - only saw 3 other people

Blimey, was it 5am?

 


 
Posted : 17/06/2025 3:24 pm
Posts: 4202
Full Member
Topic starter
 

Another update from me – just over a month to go. Training is still going well.

Was going to touch on nutrition for this post.

I will be using drop bags on the day. This means I need to think ahead about what I want and when and roughly how long it will take me between the aid stations. There is neutral aid available at all of the aid stations which means you rarely go more than about 10-15 miles without the opportunity for aid so there is plenty of back stop.

I am pacing for a 9 hour finish so my nutrition is as per that plan.

There are two drop bag locations and you hit both locations twice. Location 1 you hit at 25 miles and 78 miles and Location 2 and Mile 40 and mile 63.

I will skip location 1 on the way out as I will have enough on me from the start (1.5 litres plus what I have drank in the morning). I will be carrying 9 x 30g carb Precision Gels and have 3 of these per hour. It should be less than 3 hours to location s (40 miles in). All my fluid will be made up with 1 x 1000mg sodium plus 40g of carbs. This means I will be hitting round 100g of carbs per hour. I have done plenty of rides at this level and happy that it doesn’t cause me any issues.

At location 2 I will drop the two bottle I started with and pick up a 1.5l hydration pack plus another 6 gels. This will get me up the big climb. The hydration pack will have 1.5l with the same mix. A hydration pack will help so I can keep both hands on the bar when climbing or descending.

When I get back to location 2 I will drop off the hydration pack and grab another 1.5 litres of bottles. I will prob only drink 1l between there and the next location as it is a fast section but it helps to have more on me plus I will down what I can before the next drop bag if it means having a bit of a break before picking up more drink. I will prob need 4-5 gels for this section.

At the last drop point I will pick up another 1.5l of fluids plus another 6-8 gels. There are some nasty climbs in the last bit so it should take about 2 hours in at 9 hour pace. If it is really hot I will have another bottle with plain water in this drop bag. There are also a lot of other places to get plain water and some gels etc if needed or if things go wrong and I need a bit more fuel but the plan is to go in with the aim of hitting 9 hours or less.

I will also have in each drop bag the following: Spare tyre (I have them anyway so I might a well put them in the bag, If I need to change a tyre due to a rip it will still hopefully allow me to get in under 12 hours), spare inner tube in each drop bag, spare CO2 and head, some bacon strips.

On the bike I will have an electric inflator pump, some dynaplugs, 2 lightweight inner tubes, some tyre boots and a multitool.

That’s about it for the moment. Ill update the bike post with some pics and an overview of the bike at a later date.


 
Posted : 30/06/2025 10:01 am
Posts: 33189
Full Member
 

Another really interesting update thanks. Did you figure it out yourself or get guidance from coaches or previous riders?


 
Posted : 30/06/2025 11:51 am
Posts: 4202
Full Member
Topic starter
 

Mostly from looking through past threads on the TrainerRoad forum to be honest. There is a wealth of knowledge on there. There are pacing charts as well for 7 hours pace through to 12 hour pace


 
Posted : 30/06/2025 12:49 pm
Posts: 1178
Full Member
 

I now you said you are happy with gels and carb mix, but have you done it in high temperatures for > 6 hours?

I know that I tend to find it hard to keep up fluid intake if I only have carb mix in hot weather. I prefer having a bottle of water as well.


 
Posted : 30/06/2025 1:16 pm
Posts: 4202
Full Member
Topic starter
 

Yeh I can switch to water only if needed and dump the carb mix later in the day if the going gets hot and keeps the gels up. The above plan gives me quite a bit of flexibility which is why it is good to decouple the main fuel from the fluids but as the fluids are going in I might as well get something in at the same time especially early in the day


 
Posted : 01/07/2025 7:26 am
Posts: 4202
Full Member
Topic starter
 

Another update from me. Just over 3 weeks out now for race day. Training has been going well. I am down to 78.7kg and an FTP of 338w. My goal before the event was 80kg and 320w so its nice to surpass both measures.

Todays post mainly focusses on the bike for the ride.

I will be riding a Trek Procaliber 9.5. I have upgraded the gears to NX Eagle AXS, the brakes are XT with uprates rotors. All the other components are stock. I have fitted a pre waxed chain from KMC as I did some testing and these worked well in the dry UK conditions we have had which should be similar to Colorado at that time of the year. I will have a small botle of lube in my drop bag to put on at 75 ish miles in case it starts running a bit dry.

I have swapped out the tyres to Continental Dubnital 2.4 Rapid Race with Vittoria XC light inserts. This tyre choice is baed purely on surfing the internet at what people typically run at Leadville. Some suggest you can almost get away with a gravel tyre but these are testingg well and have felt good for the test rides I have tried them on. They normally wouldnt be great in the UK slop but it has been so dry recently so happy with them.

I have put some blips on the inside of the handlebars close to the stem and then wrapped this with bar tape. There are two 20 miles ish rolling sections on fast double track and roads so I can get into a more aero postion on these section and being able to change gear in that position is great. I have been practicing it on my commute and it has worked well.

Two bottle cages - as im short the front one will fit a 1l bottle and the back one a 500ml bottle so I can carry 1.5l on my bike plus my USWE hydration pack.

I have a 4iiii power meter on the LH crank and I will be using Shimano XT pedals with a small cage to give a bit more support to the foot on race day.

IMG_2967.jpegIMG_2968.jpegIMG_2969.jpeg


 
Posted : 15/07/2025 10:00 am
nuke, Straightliner, kevt and 4 people reacted
Posts: 4202
Full Member
Topic starter
 

Final update from the UK!

Weight is down to 77.5kg and feeling comfortable on an FTP of 338 (completed some tough threshold and VO2 max workouts at this level. Really happy with how the nutrition has gone this year. Dropped 38ish lbs and will look to maintain this weight when I get back or possibly drop a little more but will see how I go.

Bike is packed up and ready to as is all the other bits and pieces. We are heading to Heathrow tomorrow and fly out on Sunday landing in Denver. First 4 days are at 7500ft and the 2 nights before the race are at about 9000ft so hopefully that gives a decent acclimatization. 

I will prob do about an hour on Tuesday next week making sure the bike is all OK after the flight and then about an hour recon on the course on Thursday. Its race day on the Saturday. Other than that its some easy days with some sight seeing as well as hot tubs and pools to relax. Race day nutrition is all sorted so there isnt much race prep to do once I get out the US.

Some training stats for my year from the 5th Jan when I found out I would be going:

Hours on the bike: 301

Hours on walking, running and yoga: 71

Calories burnt on the bike: 206,085 or 858 snickers! (this will be fairly accurate as I have a power meter on all my bikes)

Distance: 5402 miles (irrelevant as a lot has been inside)

I might post an update in the middle of next week. Pretty excited to get going now. I have put the work in so time to see if I can make sub 9 hours for the big belt buckle (although ill be happy just to finish!).


 
Posted : 01/08/2025 10:07 am
AD, kevt, cerrado-tu-ruido and 4 people reacted
 jfab
Posts: 597
Full Member
 

I was expecting the above to read "this will be fairly accurate as I've actually eaten 858 Snickers bars since 5th January" 🙂

Good luck, it looks like a great race/"Holiday"!


 
Posted : 01/08/2025 12:45 pm
Posts: 297
Full Member
 

Good luck with the event.


 
Posted : 01/08/2025 1:13 pm
Posts: 33189
Full Member
 

Hope all that training and planning mean you smash your expectations!


 
Posted : 01/08/2025 4:45 pm
 drew
Posts: 385
Full Member
 

Good luck Rob. You've come a long way since the start of the Singletrack race series, give it your best shot.


 
Posted : 02/08/2025 3:01 pm
 LAT
Posts: 2405
Free Member
 

All the best for the race. 


 
Posted : 02/08/2025 3:30 pm
Posts: 4202
Full Member
Topic starter
 
This will be a long one…split into multiple posts. 
 
We arrived in the US on the Sunday before Leadville and drove to our accommodation at 8600ft. No one experienced any issues and we slept well at this altitude. I unpacked my bike on the Monday and had a slight buckle to the wheel so a local bike shop straightened that out for me
 
I got out on the bike on the Tuesday and Wednesday for about 45 mins each day. Both days I climbed from our accommodation up a Jeep trail for about 35 mins and the descended back down. I felt pretty comfortable and had no issues. The jeep trail was pretty rough with lose rock so was a decent test for the conditions to come. 
 
On the Thursday we moved accommodation to a place called Cooper Mountain at 9700ft. I didn’t sleep as well here but not sure if it was the nerves or if it was the altitude. On the Thursday we headed to Leadville and I got to pre ride some of the course. I climbed up Sugarloaf and then descended the power line descent. With people going both ways on the course it was tricky as I couldn’t pick my lines on the downhill. 
 
We headed into the town itself and picked up my race number had a coffee and a look around the expo picking up some freebies. At this point the bike was ready to go with just a check of tyre pressures needed. I got my bottles and gels sorted on my drop bags so we could drop them off ok the Friday. 
 
Friday we headed back to Leadville, dropped off the drop bags, went to the rider briefing, got some coffee and then went back to the accommodation and splashed in the pool whilst eating lots! Got to bed at about 9pm with the alarms set for 4am. 
 
Everything at this stage had gone to plan with minimal stress but I was definitely feeling the tension from finally getting there. 

 
Posted : 12/08/2025 5:02 pm
nuke, notmyrealname, susepic and 3 people reacted
Posts: 4202
Full Member
Topic starter
 
Race Day
 
The alarm went off at 4am. Got up, stuffed some waffles down, got dressed and drove to Leadville. Got parked easy enough. It was about a mile from the start line so my wife and son got a shuttle bus and I rode into town as a mini warm up. 
 
The pros were getting ready to go off but I had to get in my corral ready for the start at 6:42am. There was about an hour of standing around at 6/7 degrees so was a bit chilly. 
 
Finally it was our turn to start and it was a rolling start as they got everyone going in waves. The first 6 miles is pretty much downhill so it was freezing cold. I had an under armour long sleeve white base layer on designed for hot conditions along with my jersey but as soon as we got the first climb maybe 10 mins in I started to warm up. 
 
The first climb is called St Kevin’s and is pretty congested. There were about 8-900 rider ahead of me who had already set off. I tried to make passes where possible but it was so busy it was difficult. I reached the summit and first aid station (I didn’t stop) about 3 minutes behind my pace for a 9 hour finish. There is then a 4 mile mainly road descent before the next climb which is called Sugarloaf. Again I climbed well. It was still busy but thinned out a bit but I felt good and kept the feeling going with gels and drink mix. 
 
I descended powerline safely. The conditions were dry and slippery with lose sand and gritty bits. It was a fun descent and despite not being a great descender I managed to even overtake a couple of people. I came into the Outward Bound aid station a couple mins behind my target time still but close enough to still be in with a shot. The only thing that had really held me up was traffic on course but this was thinning out now as everyone made their own pace. 
 
Outward bound to Twin Lakes is supposed to be fairly flat but it was more like my local terrain near Derby with rolling hills. This is where I started losing some time. I couldn’t get into a group going at the right pace. Either too fast or too slow. There was a great bit of singletrack just before the aid station at twin lakes dam. This was the first aid station I stopped at. I picked up my uswe hydration pack with a 2l bladder and some more gels and then carried on. Total stop time less than a minute. The helpers were so slick getting the drop bags and riding through the aid station was like riding through the crowds on a Tour de France stage. Noise everywhere, people encouraging you and ringing cow bells etc. 
 
This is where I started seeing the pros on the way back. You had to keep to the right side as they descended. There was about another 4 miles of rolling terrain before the start of the 8 mile, 1100m Columbine climb. To put that in context it’s a similar height to Alpe du Huez topping out at an altitude of 12500ft. The first 6 miles weren’t actually too bad. I climbed steadily continuing to eat and drink mostly riding with the same people but overtaking some others. All the meanwhile people are screaming down the same track so passing places are limited. 
 
Then two miles from the top the terrain gets harder and it was time to walk. As soon as one person spins out there isn’t room to overtake and you end up walking. I would say I walked the next 1.5 miles before the terrain flattened out again and you could remount and finally I made it to the top of columbine. A quick stop to top up the bottle on my bike (I carried an empty bottle up for this purpose knowing there were some good sections to drink on the way down). 
 
Descending was better than I thought despite the people still coming up and gradually as you descended there was less and less people coming up. I was pretty cautious but got more confident as we went. I didn’t want to coo my brakes and it takes quite a while to descend 8 miles off road and beats you up a fair bit (especially on a hard tail). On this section plus powerline earlier I was glad I ran inserts as I hit a few bits so it prob saved either tyre damage or rim damage. 
 
I got to the bottom back through the aid station and picked up another bottle and some more gels. I was starting to get some stomach cramps by this point however and getting a it uncomfortable. I was chatting to another guy and he said we were on for about 10 hour pace now. I was happy enough with that. I hadn’t lost any time through my own lack of pace it was just the nature of the course and the traffic en route. I’m not an aggressive rider and prob too polite trying to pass people!
 
The stomach cramps got worse and I stopped at about mile 65 at a portaloo to relieve myself. I felt good for another 10 miles or so getting in to the Outward bound aid station. This was the final planned stop. I also stopped at the shimano neutral aid tent and got some lube on the chain. The conditions were so dry the chain had started squeaking. 
 
At outward bound I used the drop bags again to get another two bottles and some more gels. Then at mile 80 came another big climb. The stomach cramps were back but the climbing position was the most comfortable as you are kind of bend over double on the bike. I managed some of the climb riding but had to walk some of the steeps or particularly rocky bits. This is the steep climb you normally see on tv as it is easier to get cameras here rather than columbine. 
 
I was still on just over 10 hour pace at this point once I got to the top but was really uncomfortable. I kept going though but was struggling to take in liquids or food. The pace ground to a halt and I took it easy on the couple of rocky descents (both 3-4 miles long) as I didn’t want to bin it at this stage. For the final 90 minutes I couldnt eat or drink a thing I was in so much discomfort. Again the climbs felt the most comfortable and I didn’t have to walk anymore (so I prob walked 2 miles of the 105 total distance). I would pass people on the climbs who had got of to walk and then as soon as it got flat the body position was worse and people would come back flying past me. 
 
I limped home to finish in 11:30 bleeding loads of time in the last 10 miles but it was pretty measured at this point. I knew I could do it and didn’t want to blow up completely. I was pretty emotional at the finish. I couldn’t stand up straight and felt wasted but I had done it!
 
Was so glad to get my buckle after all the effort that had gone into it. Although the wheels came off at the end the level of fitness I had still got me to the finish line and also got me through 90 odd miles to allow me to limp home. What went wrong? Prob just digestion at altitude causing the stomach cramps. It was the one thing I couldn’t practice but at the end of the day who cares. 11:30 on the bike is a long time but honestly it just flew by. 13 mins stopped time which was bathroom breaks, stopping for drop bags. When on course I made sure I was always moving forward even at a snails pace. No bike issues and no issues with the rest of my body. No cramping or bad back etc
 
Would I go back? If I won the lottery yes but it was expensive (although we also had an amazing family holiday). There are other family adventures to have before spending money on a repeat adventure! The event was amazing, well organised and so much support on course. My wife and son had a great day chatting to people, watching people finish including the pros and generally enjoying the hospitality of the small town. 
 
When I think back to what could have gone wrong I was so lucky. No illness or injuries for 8 months of training. No issues getting everything out here. No delays or issues over here getting places. Everything went to plan. Mission complete!

 
Posted : 12/08/2025 5:04 pm
Kuco, gray, Straightliner and 24 people reacted
Posts: 4202
Full Member
Topic starter
 

IMG_3132.jpegIMG_3136.jpegIMG_3151.jpeg


 
Posted : 12/08/2025 5:05 pm
Straightliner, lovewookie, fasthaggis and 13 people reacted
Posts: 5400
Free Member
 

Well done.


 
Posted : 12/08/2025 5:14 pm
 rone
Posts: 9787
Free Member
 

Great ride and write up. I know that feeling if not be able to eat all to well..

Colorado really is a fantastic state to ride in.

 


 
Posted : 12/08/2025 5:23 pm
Posts: 1993
Full Member
 

Fantastic!

About the stomach cramps: did you only eat gels and "sport nutrition" or did you manage to eat some proper/regular food? 


 
Posted : 12/08/2025 6:08 pm
 beej
Posts: 4214
Full Member
 

Brilliant! I once considered entering the ballot with a friend but there was no guarantee we would both have got in. Reading your write up I'm kind of glad I stuck to road adventures!

Well done, glad you got the buckle and there were no disasters. A fantastic experience and thank you for keeping us updated on the process of preparing for the event too.


 
Posted : 12/08/2025 7:17 pm
Posts: 4202
Full Member
Topic starter
 

No just sports nutrition. It’s hard enough taking in gels let alone trying to chew something. Had practiced on long rides with the nutrition. Just how it goes sometimes. If I were to do it again I would probably still do the same. Just try and get the stomach used to it earlier if I could get out there earlier


 
Posted : 12/08/2025 7:38 pm
Posts: 33189
Full Member
 

Fantastic ride and write up. Congratulations on an amazing experience.


 
Posted : 12/08/2025 9:44 pm
Posts: 1050
Full Member
 

Just WOW! Well done 👍


 
Posted : 13/08/2025 9:50 pm
Posts: 1893
Free Member
 

Awesome thread and amazing updates 😎 

I don't really follow MTB/Gravel but randomly saw something about Leadville on the Cycling News website just now and thought shit, how did that guy on STW do 🤣 


 
Posted : 14/08/2025 9:13 am
Posts: 3182
Full Member
 

Brilliant effort, you'll remember that forever. Thanks for sharing!


 
Posted : 14/08/2025 10:36 am
Posts: 1171
Free Member
 

Well done. I've enjoyed the in depth posts and following your journey.


 
Posted : 14/08/2025 10:56 am
 LAT
Posts: 2405
Free Member
 

Great write up and great ride. Very well done. 


 
Posted : 14/08/2025 2:39 pm
Posts: 1468
Full Member
 

Wow ! great write up and amazing effort, very well done. 


 
Posted : 25/08/2025 8:44 am
Posts: 2425
Free Member
 

Well done Robbo! Saw your ride pop up in my Strava. Definitely deserving of kudos 🙂 Impressive, not just the ride but everything it took to get there!


 
Posted : 25/08/2025 10:16 am
Posts: 1484
Full Member
 

Well done Robbo!


 
Posted : 25/08/2025 11:41 am
 gray
Posts: 1373
Full Member
 

Thanks for writing these posts. Very interesting to follow, and well done on the training and race!


 
Posted : 25/08/2025 2:20 pm
 wbo
Posts: 1772
Free Member
 

Nice ! Good job in the race and thanks for the write up 🙂


 
Posted : 25/08/2025 3:11 pm
Page 2 / 2