The foothills that surround Boise are a distinguishing factor that makes everyone fall in love with the city. There are hundreds of miles of trails that are all interconnected; you can make it from Idaho City (45 miles north of Boise), all the way back to town on a series of singles track trails and forrest service roads.
Bogus Basin is only 16 miles outside of downtown Boise and offers year round recreation. During the winter you can enjoy world class skiing, and when all the snow melts Bogus offers the best downhill mountain biking in the Treasure Valley. The resort has 2,600 acres of of terrain that is enjoyable to skiers and mountain bikers of all abilities. More information about Bogus Basin can be found at http://bogusbasin.org/