Upper Black Box - San Rafael Swell 
Overview:
Rating: 3B II
Length: 3-5 Hours (short route), 5-7 (preferred route)
Gear: Standard Technical Gear - Wetsuit in all but the
hottest conditions
Raps: 1-60 m ( 197 ft ) (short route), 1+ to 25 m ( 83 ft ) (preferred route)
Water: Constant wading and swimming.
Flash flood Danger: HIGH - River flow also needs to be
checked before starting
Season: Late spring through early fall
Hype:
The upper black box is my favorite canyoneering adventure in the northern swell. A very short approach and exit, coupled with an amazing stretch of canyon make this one that keeps me coming back. A big thanks to jddiener for pointing out the preferred out, it makes a good canyon even better!Login For Full Details!
Photos:
My History:
I've been through the Upper Black Box several times, most recently in the summer of 2007. Although I have usually done it in the fall, summer was likely my best trip through. Midday, the lighting was excellent.
Comments (3)
Good fun
3
Wednesday, 26 August 2009 03:58
altakid
First did the better route in 91. We called it curious George but it had been done many times before evidenced by the webbing on the last/only rappel. Love the tip toe with a perfect undercling traverse around the possible kph. A german shepherd once made it to the last rap with only partner assists.
Thanks for the tip!
2
Friday, 28 November 2008 01:32
ryancornia
Thanks for the tip on the other entry. Finally checked it out last fall, it is a great way to do the upper black box! I updated this description to include it.
thanks for shortcut route
1
Monday, 17 September 2007 11:21
jddiener
Thanks for putting up the shortcut route, as we were able to combine it with an ascent of Mexican Mtn for a great medium length day. I have to admit however that I left your beta/map sitting in my printer, so just had my unmarked map... and I thought you had indicated the little side canyon just upstream of your actual entry. It actually was a fun little canyon with a couple of enjoyable downclimbs & short slot followed by an 80 foot rappel from a chokestone to the bottom. By that point (top of rappel) I knew we were on a different route, but it went so we continued. A recommended option, although next time I'll have to try your real route. Thanks.