Boulder, Montana, US
1. Fourmile to Speculator Creek (Hells Canyon)
||III-V (for normal flows)
Boulder River at Big Timber MT
1000 - 5000 cfs
Best levels uncertain. Help us out! Add a comment. Gauge is roughly 45 miles downstream, thus does not accurately reflect flow in this reach.
Hells Canyon of the Boulder is a high quality whitewater run set in a spectacular valley. A
bit of flat water leads to a massive rapid that is a portage for most or all paddlers. A
bit more chill water leads to the class IV/IV+ canyon section. The rapids are often pretty
long and continuous, and several have distinct moves to be made to boof or avoid big holes.
We paddled it at 1600 and the rapids were plenty juicy and distinct. Flows in the 3500
range are rumored to yeild Class V big water rapids that are long, continuous, and
connected. After 5-10 good rapids the whitewater eases off but remains fun to the takeout.
StreamTeam Status: Not Verified
Last Updated: 2010-07-24 00:16:21