Bitterroot Runoff Trail Runs | 5 & 10 Mile | July 10th, 2021

Registration Opens April 20th, 2021 at 8:00am

The Bitterroot Runoff Trail Runs are held on beautiful private single track trails in the hills above Lolo, Montana. There are two options – a 9.7 mile course or a 5.2 mile course. 

“The racecourse and the surrounding scenery are absolutely gorgeous. What privilege to enjoy this amazing Montana landscape while enjoying the benefits of an extremely well-managed event.”

Jill5 Mile Finisher

“Bitterroot Runoff is a great way to get the trail running season started. The course is fast yet challenging, and on a good year, you might even get to see a few elk out there.”

Nico10 Mile Finisher

“Another top-notch Runner’s Edge event! I ran the 9.7-mile course and it was a great combination of tough climbs and fun descents.  From the supportive volunteers to the generous after race brunch, every detail was thought of.  I am looking forward to running this race again.”

Danelle10 Mile Finisher


  • 5mi | $40
  • 10mi | $50

There will be no refunds, deferrals, or race transfers. 

Runners Receive:

  • Finisher Award
  • Post-Race Snack
  • Hammer Nutrition products at our Aid Station
  • 2021 Custom Bitterroot Runoff Neck Gaiter
  • Chip Timing


  • Awards will be given to top 3 male and female overall as well as to the top male and female in each age group.


Friday (7.9.21):

  • 10:00am-4:00pm: Packet pick up in the Runner’s Edge basement

Saturday (7.10.21):

  • Race Day.  Schedule with wave starts TBA.

Aid Stations

For the 10 Mile race, runners will pass by the same aid station at miles 2 and 6.5.  Runners in the 5 Mile race will have one aid station at mile 2.  There will also be food and drink at the finish area.  See the map below for aid station locations.

Aid stations will provide:


This event is located on a private trail network just west of Lolo, MT.  Click here for a map showing the parking area and start/finish line of the race.

Directions to start line from Missoula:

  • Head south on HWY 93.
  • At first stop light in Lolo, take a right onto Ridgeway Drive.
  • Quickly take your first right onto Coulter Pine St.
  • Follow along Coulter Pine for six tenths of a mile, then turn right onto Bristle Cone Pine.
  • You will head through a gate and into a field where parking and the start finish area of the races are located.

Parking is limited, please carpool if you can!

10 Mile Course | 2025 Feet Elevation Gain

5 Mile Course | 1047 Feet Elevation Gain




Thank you to our sponsors for their generous support of this event!

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