Observation: Summit

Location: Colorado Ridge - Fresno Creek Drainage

Route & General Observations

Toured back to pit location very close to where old topo maps mark “Fresno Mines” at 2650’.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?No
Cracking (Shooting cracks)?No
Observer Comments

Saw the small crown of what looked to be a 2-3 days old wind slab avalanche on the cross-loaded N-NW side of a rib off the main ridge directly south of pit location and approx 500’ higher.
Saw what *might* have been a small glide crack opening up on the southwest face of Fresno Ridge, directly across the creek from pit location and a bit higher elevation. Visibility was variable between poor and bad, so hard to be sure what we were seeing was actually a glide crack.

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.

Temp: -1C
Wind: Light/Moderate, mostly from the east throughout the day
Sky: Variable between overcast and obscured
Precip: S1 average throughout the day, pulses of S2

Snow surface

New snow! Wet at the highway, transitioning to moist for most of the day above 2000’. Appeared to be trending toward dryer new snow later in the day.


HS165 at pit location. See pit profile attached.
Multiple results in compression tests on an interface between layers of new-ish snow at 140cm.
ECTX. After test completed, and while pulling column forward into the pit with shovel on the back wall, slab broke Q2 on the facets between ice layers at approx. 65cm. Took a lot to get it there, but when it broke it was a big cohesive slab.

During tour, a couple quick hand pits and jumping on rollovers did not produce any results.

Photos & Video
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