Sullivan Creek

Below Ball Creek to Hungry Horse Reservoir(Gorge Run)

Reach banner
DifficultyIV
Length3.7 mi
Avg Gradientn/a
Reach Info Last UpdatedMay 11, 2026

River Description

Sullivan Creek is a short, high-quality series of class IV bedrock rapids through small gorges flowing off of the east-side of the Swans. The whitewater is continuous, but all boat-scoutable and there are good eddies to look a little farther ahead if no one has been in there to see the wood situation. Most rapids are easy read-and-run, but there are some smaller stout holes to be aware if you're not careful. Paddlers should be solid at the grade. After the mile-long upper gorge drops off, Sullivan Creek flattens slightly and then enters another series of small gorges with a drastically different character: fun surf waves, interesting eddies and a scenic walled-in feel. It is a fantastic exit to a very good whitewater run. To reach the put-in, park at NF-547 on the east side of Sullivan Creek at the gate, and hike up about 2.75 miles before dropping down a road wash-out into Sullivan Creek proper. We dropped in from the regular road, but I think you could take NF-547C down to the wash-out to shorten the hike slightly. This will put you just above the good stuff in the first gorge. The take-out is the road bridge crossing the Hungry Horse reservoir at the end. Say hi to the fishing boats as you pass by. You can hike higher up as well: We hiked all the way up to the Connor Creek/Sullivan Creek confluence which gives you another 3-4 miles of braided, low-gradient class II with a few wood portages.


River Features

Put-in

Distance: 0 mi

Road 895 Bridge

Distance: 2.22 mi
Take Out

We hiked packrafts in and then hardshells and found a fantastic, very high-quality III/IV gorge. As of 5/9/26 it is very clean.

Nathan Johnson and I paddled part of the low-walled gorge on Sullivan Creek in the late-day baking sun after driving into the South Fork Valley. The South Fork Flathead at Twin Creek was 7,500 cfs. The creek was probably at a really nice flow for the whitewater, but felt pushy at that flow with the amount of wood. We found great whitewater and ran some quality Class III and IV but wood interrupted our run. Nathan was in his homemade ducky and I was in a kayak. We had not heard of prior runs but surely there were. The next day we kayaked Upper Twin Creek, followed by pack rafting Lower Twin Creek the following day.