The Idaho trails begin when you reach the Two Top - Black Canyon trail system. This tour is a full days ride from West Yellowstone. One of the most popular destinations is Big Springs. Bring some crumbs to feed the fish at the bridge!. Once you reach Big Springs you might consider getting gas, which can be found at several locations in the area. From Big Springs, your options are limited, you can take the Black Canyon Loop or better yet head back and take the meadow creek trail which brings you to Valley View. The Meadow Creek trail gives you a full vista of the Centennials. From Valley View you can take the Twin Creek trail to Two Top or head back via Lionhead.