It’s fantastic there… there’s a bike park in saint luc, it’s pretty small but the best thing about that is that you can use it to access other better high level trails. You can also use the excellent post bus service from any town to do uplifts.
This company are great and will show you the best trails,but to be honest having a look on a map and picking one at random would also work.
http://ridethebesso.com/
There’s an enduro race in Zinal every summer that uses some great trails, sorry I don’t think there’s a map online for that. You could have a look at the classic map.geo.admin.ch site for general maps, or this site is pretty good – bikingspots.ch<span style=”font-size: 0.8rem;”> . Their descriptions are pretty reliable. The chandolin ride listed there over the Illpass is simply incredible. Access by bus and then a chairlift in summer. Finishes all the way down in the Sion valley.</span>