The Southwest Idaho Mountain Biking Association (SWIMBA) is a 100% non-profit, volunteer organization dedicated to building and preserving a world-class, multi-use trail network in Southwest Idaho.


Since the early 1990s, SWIMBA has been enhancing Southwest Idaho’s trail recreation experience by:

  • Putting on fun events like the Tour de Fat to raise funds for new trail projects
  • Educating riders about the responsible, shared use of trails
  • Promoting and participating in the purchase of open space and trails
  • Working in partnership with Ridge to Rivers, the Bureau of Land Management, U.S. Forest Service and private landowners to build new trails and trailhead facilities
  • Teaching kids and adults about mountain biking technique and bike maintenance



Southwest Idaho Mountain Biking Association
P. O. Box 1443
Boise, ID 83701
Contact us: swimba.trails@gmail.com