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Half Mountain is along the crest of Long's Peak/Glacier Gorge's Northwest ridge. This subarea includes: Astro Tower, Darkberry Buttress, Astro Slab (aka The Chronic Buttress), and Astro Monk.
Gillett's 2001 RMNP Climber's Guide ascent from Mill's Lake. It may be considered the worst approach hike ever. Per Scott Kimball, the bushwack angling around slabs and talus then through Krummholz forests took over three hours from the lake.
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Mountain Project's determination of some of the classic, most popular, highest rated routes for Half Mountain:
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The 400 foot high, square topped buttress right of Astro Tower has been named Astro Slab; aka Chronic Buttress. Endure a long slog through the windtimber before roping up below the left side of the buttress below an obvious, white rock scar.P1. Climb a 5.9 thin crack just right of the scar. This is a nice pitch to nice ledge.P2. The crux pitch: a distinctive, fish hook, thin crack, reminds one of a Lumpy, Book crack.P3. Finish on a steep and blocky 5.8 rib to the summit....[more] Browse More Classics in CO
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