Boulder Creek, Colorado, US
|Usual Difficulty||IV-V(V+) (for normal flows)|
|Avg. Gradient||375 fpm|
|Max Gradient||431 fpm|
|MIDDLE BOULDER CREEK AT NEDERLAND|
|codwr-BOCMIDCO0||200 - 500 cfs||IV-V(V+)||08h12m||30.7 cfs (too low)|
Upper Middle Boulder Creek between Boulder and Nederland, Colorado, is a fast and manky run.
At medium flows this is a pretty stout run. At high flows it is insane, and at low it is much more manageable but bony as hell. Boat ripper.
The mile above Boulder Falls (Boulder Falls is on the North Fork Boulder Creek just above the confluence, there will be ton of tourists there) is pretty much one giant Class V+/VI rapid with every river hazard Colorado holds; wood, undercut, sieve and more!
Below the entrance of North Boulder Falls into Middle Boulder the streambed mellows out a bit to Class IV+ spiced with the occasional Class V to V+.
Even this lower section is pretty much nuts at high water so usually we end up paddling it at low water when the holes are painless <300cfs.
The "sane" put-in is about a few hundred yards above Boulder Falls, near mile marker 33. Sikbirds put-in at mile marker 32 and get a mile of manked V+ and VI with lots of wood upstream of the "sane" put-in. The takeout is at an obvious Blue bridge. Hwy 119 follows the creek.
See Colorado Rivers and Creeks II, by Banks and Eckardt (The Bible), for info on this and most of the other great runs of Colorado.
Lat/longitude coords are approximate, from TopoZone.
The various reaches of Boulder Creek,
Jasper Creek (Class V+/VI),
The Source (Class V),
Upper Boulder Canyon (Class V/V+),
Lower Boulder Canyon (Class IV),
Boulder Town Run (Class II/III),
North Fork Boulder (Class V+/VI),
Alto-Alto (Class IV),
Upper South Boulder (Class V+/VI),
Lower South Boulder (Class IV/V+/VI),
Eldorado Canyon (Class V+)
|Mile||Rapid Name||Class||Features (Legend)|