Seal Rock is one of the most visible Flatirons from Boulder with its distinctive yellow and orange north face. High on the south side of Bear Canyon, this rock offers sporty trad climbing and potential for bold new routes on the radically overhanging south face. There is one sport route, the three pitch Sea of Joy on the north face, and a good 5.4 slab route climbs the east face before rappelling off the summit.
Getting There
Follow the Mesa Trail south from NCAR, passing the two sharp switchbacks that enclose the Bongo Boulder en route to the top of Radio Tower hill. Fifty yards past the turn-off for the Bear Canyon Trail, which heads west into the canyon, notice a small trail cutting up and right (west) into the trees. This unsigned trail is the Harmon Cave Trail, which takes you past the gated-up Harmon Cave and switchbacks up a steep hill to the south en route to the base of Seal Rock. Stay left for the south face routes or go right to reach Archaeopteryx and Sea of Joy on the north face.
Getting Off
Addendum: There are at least 3 ways to get off this crag from the summit. 1) You can downclimb Shortcut, 5.4. 2) You can do a 50m rappel Sea of Joy's anchor bolts (40 ft E of the summit) on the N face. Note, the rope can get stuck on the pull. 3) Supposedly, you can downclimb 40 ft to the W, then go down a ramp to the SE, and then rap 135 ft from an eyebolt.
Seal Rock is as good as Flatiron scrambling gets. Supposedly it's uncrowded, but the day I was there two groups of two were climbing this route. They were really friendly, and I tried to be, so it's all good.Begin just up to the left of the lowpoint of the rock. Head up, following the path of least resistance. Maybe that should be 'follow the path of most assistance' as there isn't much on this rock to resist upward progress. I stayed pretty...[more]
Some clarification on the approach: as you walk south from the Bear Canyon turnoff it is easy to overlook the Harmon Cave trail. If you reach the Fern Canyon turnoff (also to the right as you head south), then you've gone too far.
Some further info on the primary, 165' rappel from this rock: check out Rossiter's topo to find it. Some of the route descriptions here that describe how to get to the rappel can be deceiving; it is actually below the false summit with all the marine life on it, right on the very north edge of the east face. If you go all the way to the true summit you will have to downclimb and return to the rap station.
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