Trilobite Range and Big River Meadows

The heart of the northern Bob Marshall Wilderness

Trip Details

Trip Date:

08/02/2020 - 08/09/2020

Trip Type:

Stock Supported

Number of Days/Nights:

8 Days - 7 Nights



Distance with Day Hikes:



Price Per Person:





  • Mountain lakes
  • Peak climbing
  • Trilobite Range
  • Fishing
  • Swimming


Hike near stunningly clear alpine lakes, in large open meadows and through immense limestone valleys on this spectacular eight-day trek into the northern heart of the Bob Marshall Wilderness.

This point-to-point backcountry hiking trip visits the Trilobite Range that towers above the Middle Fork of the Flathead River and the Trilobite Lakes, the crystal-clear small mountain lakes nestled just below the impressive peaks. We’ll spend several days exploring the area, hiking to the lakes for a refreshing swim or for a summit bid to Trilobite Peak (8,245’), with unparalleled views in every direction waiting at the top.

Additional stopovers are the high elevation Big River Meadows—an idyllic place surrounded by the limestone peaks of the Continental Divide—and the beautiful rock pools and small slot canyons of the South Fork of Birch Creek.

If you are looking for a Bob Marshall Wilderness adventure that has it all—peak climbing, river walking, fishing alpine lake swimming and wildflower viewing –this trip is for you.

Please call or email for more details.
(406) 289–0863


Deposits are non-refundable, and the balance is due by May 15th  unless otherwise specified.  The balance is non-refundable after this date.  We do not give refunds for any reason. This includes but is not limited to: route changes due to wildfires, smoke, floods, trail conditions, or unprecedented weather events.  We do not give refunds if personal health inhibits you from participating on a trip.  Because of this, we STRONGLY recommend purchasing trip insurance.  We recommend Global Rescue’s Signature Travel Insurance.

Trip Rating Definitions



  • 5 - 8 mile travel days along river grade trail with some undulating terrain, but no major changes in elevation. All hiking is on maintained trail.


  • 6 – 10 mile travel days with some of those days requiring changes in elevation of 500 – 1200 ft. over several miles. Short portions of route may be off-trail.

Moderately Strenuous

  • 8 – 12+ mile travel days with some days having a combined change in elevation totaling 2,500 feet, or more, over several miles. Off-trail hiking and routing finding with short portions of limited exposure possible.


  • 7 – 12+ mile travel days with regular changes in elevation over a few miles. Frequent off-trail hiking over uneven terrain with areas of exposure and route finding involved. Previous backcountry experience required.

*Please note these descriptions are used for travel days only and are our attempt to provide a rating for the overall trip difficulty. On layover days we will offer optional hiking opportunities that may not be in keeping with the rest of the trip difficulty rating.

Additionally, changes in elevation are meant to represent the days’ starting and ending elevations, but not necessarily the total elevation lost and gained throughout the course of the day. If you have questions or concerns regarding trip difficulty and your abilities please contact us.