We're hiring an experienced UX Designer to join us in Boulder, CO.
Mountain Project Logo

Routes in The Fin

Andrology T 5.12a 7a+ 25 VIII+ 25 E5 6a
CG's Naked Fun Time S 5.10b 6a+ 19 VII- 19 E2 5b
Dynamometer T,S 5.11b 6c 23 VIII- 23 E3 5c
East of Eden S,TR 5.9 5c 17 VI 17 HVS 5a R
Edge of Time S,TR 5.9 5c 17 VI 17 HVS 5a
Lost Time T,S 5.7+ 5a 15 V+ 13 MVS 4b
Oreivatis Rex T 5.12a 7a+ 25 VIII+ 25 E5 6a PG13
Slabbed Up-Side da Head S 5.11a 6c 22 VII+ 22 E3 5c
Unknown S 5.9 5c 17 VI 17 HVS 5a
Elevation: 9,534 ft
GPS: 40.313, -105.541 Google Map · Climbing Area Map
Page Views: 54,734 total · 287/month
Shared By: Richard M. Wright on May 16, 2002
Admins: Leo Paik, John McNamee, Frances Fierst, Monty, Monomaniac


The Fin is another elongate formation near the top of the hill and is host to half a dozen good routes. The crag really has some mixed lines that take a piece or two of trad gear, and a set of Camalots will suffice for everything. Overall, the climbing on The Fin is great (***), however, some of the stone can be friable so don't yard like Hell on everything. The area classic, Edge of Time (5.9) should just get its bolts upgraded with one or two new ones to turn it into a more satisfying lead. Since it is not difficult, just stay in tune and use the feet. A 60 meter rope will descend from everything, or you can walk off to the right.

Getting There

Hike to the right around Lily Lake. Just before the bench head up hill via a climbers trail that doesn't look like much immediately. The trail takes you up along a corridor between the main climbing formations. The Fin is on the right and near the upper end of the corridor and just opposite the Dinosaur's Foot.


AB. Unknown, 9, 1p, 75', TR.
B. East of Eden, 9, 1p, 85', TR, now bolts.
C. Lost Time, 7, 1p, 80', bolts & gear.
CD. Unknown, 9 R, 1p.
D. Edge of Time, 9, 1p, 85', bolts.
E. Oreivatis Rex, 13 PG-13, 1p, 100', bolts & gear.
F. Andrology, 11+, 1p, 100', bolts.
G. Dynamometer, 11, 1p, 90', bolts.
H. Slabbed Up-Side da Head, 10+, 1p, 70', bolts.
I. CG's Naked Fun Time, 10-, 1p, bolts.
J. Stegosaurus, 1p, gear.

9 Total Climbs

Route Finder - Best Climbs for YOU!

Location: The Fin Change
Type:  to 
Sort by:   then:

Classic Climbing Routes at The Fin

Mountain Project's determination of the classic, most popular, highest rated climbing routes in this area.
5.7+ 5a 15 V+ 13 MVS 4b
Lost Time
Trad, Sport
5.9 5c 17 VI 17 HVS 5a R
East of Eden
Sport, TR
5.9 5c 17 VI 17 HVS 5a
Edge of Time
Sport, TR
5.10b 6a+ 19 VII- 19 E2 5b
CG's Naked Fun Time
5.11a 6c 22 VII+ 22 E3 5c
Slabbed Up-Side da Head
5.11b 6c 23 VIII- 23 E3 5c
Trad, Sport
5.12a 7a+ 25 VIII+ 25 E5 6a
Route Name Location Star Rating Difficulty Date
Lost Time 5.7+ 5a 15 V+ 13 MVS 4b Trad, Sport
East of Eden 5.9 5c 17 VI 17 HVS 5a R Sport, TR
Edge of Time 5.9 5c 17 VI 17 HVS 5a Sport, TR
CG's Naked Fun Time 5.10b 6a+ 19 VII- 19 E2 5b Sport
Slabbed Up-Side da Head 5.11a 6c 22 VII+ 22 E3 5c Sport
Dynamometer 5.11b 6c 23 VIII- 23 E3 5c Trad, Sport
Andrology 5.12a 7a+ 25 VIII+ 25 E5 6a Trad
More Classic Climbs in The Fin »

Weather Averages

Days w Precip
Prime Climbing Season


A little extra help on how to find this crag - keep going on the trail right next to the lake shore. When you see a bench with a trail off to the right just before it, start heading up. That trail immediately splits, and you'll want to take the smaller more gravelly trail off to the right. Keep heading up that as it crosses the ridge trail. You can also take the ridge trail up, but the turnoff for the crag trail is a lot harder to spot that way unless you've been there before.

When in doubt, you can actually google maps to 'Edge of Time Rock'. Oct 16, 2016
Jonathan Siegrist
his truck
Jonathan Siegrist   his truck
My father and I have added CHAINS to the climbs Dynamometer and Andrology so that you can lower to the ground/pull your rope/TR, etc without the hastle of walking off.
Enjoy! Aug 12, 2007
Checked this area out about a month ago cause I didn't get a chance to climb last summer and the Fin is LOADED with great steep, crimpy, clean routes. I saw about 4 more lines than posted in Gillett's guide. I was doing edge of time 2 summers ago and I overheard someone putting up a 5.13 right in the center of the Fin. Could be wrong. Jan 28, 2003

More About The Fin

Printer-Friendly Guide
What's New

All Photos Within The Fin (108)

Most Popular · Newest