The Grand Trilobite Range Traverse Backpack

The ultimate rugged Montana wilderness adventure

Trip Details

Trip Date:

07/03/2022 - 07/12/2022

Trip Type:


Number of Days/Nights:

10 Days - 9 Nights



Distance with Day Hikes:



Price Per Person:




Book this trip:

Online Reservation


  • Wilderness Solitude
  • Montana backpacking
  • Peak climbing
  • Alpine Lakes
  • Off-trail exploration
  • Wildflowers
  • Beautiful Vistas


Experience the rugged peaks and crystalline lakes of the Trilobite Range in the Bob Marshall Wilderness of Montana. This 10-day backpacking loop affords you an opportunity of adventure like no other. It’s the most strenuous, most adventurous, and longest trip we offer. With all you need on your back and a trip long enough to truly forget what day it is, this is wilderness immersion at its finest. From Argosy Peak (8,155’) to Pentagon Mountain (8,873’) to the north end of the Chinese Wall, this backpack explores some of the wildest country in the Bob.

This excursion includes several layover days to climb peaks or enjoy a good book in the high country. The moving days are mostly on-trail, but a few include off-trail travel with a full backpack. With one food drop mid-way through the trip, your average backpack weight is typically between 35 and 40 pounds. You may encounter downfall, snow patches, and high water on this trip. It is important to be in very good physical shape, and previous backpacking experience is necessary. One client on a past backpacking trip put it well when she said she’d “never been on a trip that had been so physically invigorating and completely relaxing at the same time.”

The backpack trip circumnavigates the Trilobite Range, which is over 10 miles long. You will spend several days hiking beneath its towering peaks and ridges, exploring little tarns and larger lakes while witnessing the lush early summer beauty of snowmelt, sunshine, and wildflowers galore. You will also have the opportunity to climb several peaks along the way. If you’re looking for true wilderness adventure, solitude, and a serious physical challenge, this is the trip for you. 

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


Deposits are required at booking and are non-refundable. Trip balances are due by May 15 for summer trips and August 1 for fall trips unless otherwise specified. The balances are non-refundable after these due dates. We only give complete refunds in the event that you do not successfully draw a tag. Other than a non-successful draw, we do not give refunds for any reason. This includes but is not limited to: route changes due to wildfires, smoke, floods, trail conditions, a non-harvest hunt, or unprecedented weather events. We do not give refunds if personal health inhibits you from participating on a trip including exposure to an airborne virus or illness. Because of this, we STRONGLY recommend purchasing trip 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.