Cordada
Climbing at Dirty Dozen Boulder Area
37 boulders on 13 walls, V0–V4. In Colorado. When the rock grips hour by hour, topos and people to climb with, in the app.
What grades are there?
Boulders by grade
From V0 to V4. Half are between V2 and V3.
Each climb counts at its grade; ungraded ones are left out. In the app you can switch to French, UIAA, British or Font grades.
Sun and shade
Mostly north-facing: shade for most of the day. A summer crag; cold in winter.
Estimated best season: April–June · September–October. Worked out from each wall's aspect and the latitude; the app fine-tunes it with what climbers log.
Friction ScoreHow the rock grips, hour by hour and wall by wall. In the app, for every crag on the map. See it in the app →ILLUSTRATIVE EXAMPLE
The 13 walls
Route names, topos and approaches are in the app.
On the map
Crags nearby
Climb more. Guess less.
When the rock grips, hour by hour and wall by wall; topos, your logbook and people to climb with. In your units (°F or °C) and your grades (YDS or French). The social side is free, always.
