This is a Premier Route (Chamonix round trip). To claim an FKT on this route, you must meet a high standard of documentation and verification. See details here: https://fastestknowntime.com/premier-routes.
The variations we currently track are:
The Illinois Prairie Path is a multi-use nature trail for non-motorized public use. It spans approximately 61 miles in Cook, DuPage and Kane Counties in Northeasten Illinois. A former right-of-way for the old Chicago Aurora & Elgin electric railroad, it was the first U.S. rail-to-trail conversion in the nation in the 1960’s.
Start your watch at the trailhead of the Garibaldi Lake Trail (Rubble Creek parking lot) and stop it on return. Follow the route described in Matt Gunn’s Scrambles in SW BC.