Welcome to Boundary Expeditions – your adventure outfitter providing safe, exceptional quality river trips on the Middle Fork of the Salmon River in Idaho.


From May to October, we provide 5 night / 6 day Middle Fork rafting trips ranging from 75-100 miles. Adults and youth enjoy thrilling Class III+ whitewater rafting, hiking, world-class fishing, camping, delicious cuisine and the highest level of service from our professional guides and staff.


  • Well-appointed camp set ups including oversized tents for a fully outfitted camp experience
  • Smaller groups with better guide to guest ratio
  • Exceptionally trained guides, safety is the utmost priority
  • Local organic food whenever possible
  • Conservation ethos
  • Only operation that has a Big Creek trip, with excellent fishing
  • Trained naturalists
  • Custom trips
  • Exclusive dates


"First time on the Middle Fork and we are still in awe. Beautiful scenery, friendly guides, and fun whitewater! Camping next to the river and traveling by raft is something everyone should experience. We caught our first West Slope Cutthroat on a fly rod and it’s now my 14 year old son’s favorite sport."

We specialize in custom trips and smaller groups providing premier service to our guests. From the moment you arrive on a Boundary Expeditions journey on the Middle Fork of the Salmon you’re a part of our family, and we aim to show you incredible service and an unforgettable river experience that will keep you coming back for years to come.