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

Middle Fork of the Salmon

Middle Fork of the Salmon

Big Creek

Big Creek

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
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.


"All of us were incredibly impressed with the Boundary operation and especially the crew. The entire crew was professional, friendly, and dedicated to both sharing the magic of the river and meeting the high standards that Boundary clearly expects of them. As a group this is our fifth commercial river trip together and Boundary has reset the bar pretty high!"

"I would highly recommend this experience to all active duty members and veterans who are able to attend. Being able to completely unplug from the troubles and trials of everyday life was a great gift and entirely recharged my mind. Thank you for the trip, experience, and the friends that I will always cherish."

"Kudos to Boundary Expeditions and their staff for their exceptional and professional service while on the river. Again, my expectations were exceeded- from arriving in camp and having my accommodations already set up, to the warm hand towel to wash my face and hands, to the superb meals."

"Boundary Expeditions is a world-class facilitation all around, on one of the finest rivers I have been on no less. Eric and his crew exceeded all my expectations. The rafting experience was both challenging and relaxing simultaneously. Sometimes that combination can be challenging to achieve and you nailed it!"

"Boundary Expeditions made our trip on the Middle Fork of the Salmon a trip of a lifetime. Spectacular scenery, adventurous whitewater, and amazing fishing, all enhanced by an expert crew who clearly care deeply about sharing and protecting this crown jewel of our nation's Wild and Scenic Rivers."

"The mail has been sorted, the emails answered and re-entry is well underway with incredible memories of a week filled with new friends and new places! Thank you for all your hard and very thoughtful work to allow us to be present, knowing you had everything covered!! Each of your guides and “special extras” brought warmth, skill and so much FUN! An incredible week all around! Thank you."

"Boundary Expeditions is a fantastic organization! Eric, Justin and the crew were top notch. We certainly felt like family at the end of the trip and I would highly recommend using this very organized and professional company for your next rafting trip! Thank you Boundary Expeditions for helping make lifelong memories for our family and friends!"

"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."