2004-6-15 2004-3-4 This great beginner cycling trail located East of Ashton, Idaho, heads up an old rail road grade. The scenery is pleasing the the ride through the old tunnel a fun diversion. Continuing beyond the tunnel you can visit Warm River Springs, Big Springs, and West Yellowstone. 61208 text/html 1.0 EN Warm River Tunnel Cycling Springs Idaho Warm River to Tunnel and Warm River Springs cycling trail, North East of Ashton, Idaho text