Difficulty V+
Length 1 Miles
Gauge Boulder River at Big Timber MT
Flow Range 4.20 - 6.50 FT
Flow Rate as of: 29 minutes ago 1.83 [FT] ℹ️
Reach Info Last Updated 11/12/2019 7:08 pm

River Description

Boulder Falls Canyon is a sight no one should miss and is a hell of an exciting run to boot. The Boulder river charges down a great looking class V-V+ drop before plumetting into an enormous hole that happens to drain most of the river through the now collapsed "Natural Bridge". The entire river goes through this hole at lower flows and comes shooting out of the cliffs below into the Boulder Falls Canyon. Needless to say, don't run the section above the falls... At medium and high flows, the river actually reaches the lip of the 105' falls creating an incredible scene to behold. I finally hiked down in there last year with some friends and really enjoyed the stretch of whitewater that runs below the falls through a striking limestone canyon. There are a few major sieves in the canyon that you should be wary of, for there is no return from getting sucked in. They are enormous. Fortunately, you can put in at the base of the falls, paddle to just above the first rapid and scout the entire canyon on river right. It felt like V+ or 5.1 at 3500 cfs on the downstream gauge. Definitely manageable, but with very little room for error in a couple places, and a fairly large pucker factor involved throughout. If you're up for it, try it out. It is a fantastic view from river level and a Sunday afternoon you won't soon forget.

Rapid Descriptions


Gage Descriptions

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Directions Description

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No Accident Reports



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Appeal Challenging Montana Navigability Is Denied

Jason Robertson

On May 28 the U.S. Supreme Court denied an appeal by Mountain States Legal Foundation who filed a lawsuit in June 2001 alleging the 1985 Montana Stream Access Law violated their rights under the U.S. Constitution to regulate who floated over their land.

The decision thereby protects Montana's Stream access law and public rights of navigation throughout the State.

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River Recreationists Win Big in Montana!

Jason Robertson

The Missoulian newspaper reported on January 5th, 2001 that U.S. District Judge Charles C. Lovell dismissed a case brought by the Mountain States Legal Foundation challenging public recreational rights on Montana’s rivers and streams. This is a huge win for boaters and fishermen!

David Schroeder


Revision #Revision DateAuthorComment
1213884 11/12/19 David Schroeder updated image position
1190784 03/22/07 David Schroeder n/a