Online mapping software

Memory Map allows me to do that - you select the ‘visibility’ for each route individually.

You can have several routes overlayed in RWGPS / Ride with GPS , and switch between them.

Not sure I understand your requirement though... What do you want to do?  Is this for planning whilst at home on a decent sized screen, or something you want to do on the move on a tiny phone/GPS screen?

I’ve tried all sorts over the years, and Memory Map seems to be the only one which can show several tracks at once, so you can see what you’ve done and what’s left to do. Anquet, Quo, Tracklogs and numerous online ones show one track at a time. MM lets you put routes in categories so you can arrange them by area, or by activity, or whatever you want.

Another for memory map for this.

DofE manager here and we get OS mapping for free. However, trying to view multiple groups to coordinate assessing it's a non starter. Memory map works for this.

Memory map currently have a sale on I think - or rather I got an email with an offer yesterday.....

Another Memory Map here - and I got the email about the OS Map sale too

I use this one to view multiple GPX files at the same time but it only has OSM and not OS mapping.  Just drag and drop the files in to the Tracks area.

https://mygpsfiles.com/app/

QGIS is you want to do it professionally and free.

Not online though.

I use this

https://brouter.de/brouter-web/#map=10/55.0481/-6.5273/standard

imports GPX files.

GaiaMaps imports and displays multiple GPX files at the same time. It also allows you to assign different colours to each one, as well as show/hide individual tracks

I use Memory Map, a great bit of software.

I have also used this too; https://gpx.studio/

Garmin Basecamp does this but it's a software install, not "online".  It is free though.

Ta. By online I mean on a computer as opposed to paper.

At home, big screen so I can see where all the routes go. Cheers

On your phone, Back Country Navigator

Unless you are unfortunate to be an apple user

Phone? Nope, the twirly wire gets in the way and the screen is too tiny.

My GPS files does the trick. Thanks all.

Fyi, apologies for slightly off topic but just got an email from memory map re their sale and app

Memory map app and os maps sale

The perpetual license allows you to use the map for as long as you like without ever having to worry about the licence expiring, but it does not include any map updates. Many of our customers are still using maps published many years ago, and that is fine when the hills don’t change. However, footpaths and other man-made features do change, and it is important to know your rights of way and open access land areas. We find, in practice, most people update their maps at least every 5 years.

Click HERE for the 1:25,000 OS Explorer map (from £19.99)
Click HERE for the 1:50,000 OS Landranger map (from £15)
For more information see our website HERE.

Memory-Map for All app

https://memory-map.com/maps/uk-os-topo-maps/?adref=2402

https://memory-map.com/software/mmfa/

Google Maps can do this, I think you upload them as layers...