If you are a stud you can ride from Verbier to Grimentz in a day ! Grand Raid Christalp

With a little planning you can spread that out with some stops. There have been a few threads on here on similar trips. Hopefully someone will post links to them.

From Zurich you can link up into Lenzerheide/Arosa/Davos with a mix of mountain railways and lifts

I work in Zurich but live in Davos at weekends, there are nice routes not far from Zurich but some really great rides in Davos / Graubunden.

This is a group that I ride with mostly around the Zurich area, but they also travel all over CH. They might offer advice if you email them, but this club is a hobby for Dave, so not sure how much time he has.
http://www.alpineadventure.ch/

The Davos trails are pretty good, more xc style, but there are some really good technical steep rocky tracks if that is what you like.

There are three lifts open for bikes in the summer. Parsenn is a good way to gain height for some longer xc rides, Rinerhorn has only a few options from the top, again xc. Then Gotschna which is the lift for a freeride track, then a top lift leads to the more techy steep tracks. Apart from the freeride, all tracks are duel use, so expect to find lots of walkers there and pretty slow going, walkers can get very pissy towards bikers, if you don’t give them space / use the horn.

Lenzerheide is 1 hour from Davos and has decent uplift with mulitple trails and is holding a round of the worldcup DH this summer.

Flims/Laax has good uplift and decent single track, a nice freeride trail and is a pretty cool place.

I have not been myself with the bike. but 1.5 hours from Davos there is also Livigno which is lift assisted DH trails, but there is also xc available.

Also I recently saw a great looking video from St. Moritz, again, not ridden it, but I will do this summer.

I have not done much biking other than Graubunden region.
Hope some of that helps,

Phil,

No worries,

Davos is not a big place, but is definitely built up, and not that pretty in all honesty.

I have only been to Lenzerheide twice, but it is a much prettier place, nice lakes, narrow valley floor, I imagine there would be some nice remote accommodation around there.

Flims is not far from lenzerheide either and is next to the Julier pass which links straight to St. Moritz.

There are a few small villages close to Davos which are quite pretty, but exactly remote and I don’t know anything about the available hotels / acomodation, Monstein (has a brewery!) Wiesen, Clavadel.

Even Klosters is a much more typical looking alpine town than Davos. It is a lot smaller and has a nice atmosphere in the summer.

OP Davos is relatively large I recall with 10,000 permanent residents. Klosters is very nice and Lenzerheide is pretty too with the lakes and riding both sides of the valley. With the mountain railway from Chur upto Arosa you have some options to play with for uplifts in addition to the ski lifts. In the past I found some forums with routes in the area

As an aside I saw last year this ultra marathon around the Eiger / Grindelwald area. The longest route is 100k and 6500m climbing and I wondered whether it might be an interesting ride, various huts on the route. Maps etc on the site and a video. I’ve no idea what it would be like as a ride in terms of technicality / single track etc

eiger ultra