West of Ketchum, there are lift-accessed mountain bike trails on Bald Mountain. Starting from River Run Plaza, you can either use the lifts to get up to the Lookout Restaurant summit, or you can bike up the Bald Mountain Trail (4.5 miles). From the summit, there are two exceptional routes down using either the Cold Springs Trail or the Warm Springs Trail. Both routes down are roughly 8 miles long descenting 2,500 feet.
Tip - The trails on Bald Mountain are closed in the Spring through July 1st due to an elk calving closure. The ski lifts usually start spinning around July 1st.
Overall, Bald Mountain is the 62nd most popular mountain bike trail of all 63 mountain biking rides in Idaho.