Mahana Peak east face
40.1990, −105.6568 · 3,684 m · E · 25° · 0.12 ha on Sep 27
Snow · shrinking
From the satellite, Sep 27 pass. No ground report in the last 10 days.
What the satellite saw
Drag the handle to compare two passes; tap a pass below to change them. The blue line is what the scanner counted as snow.
0 200 m
N
Every pass this season · tap one to compare it
Sentinel-2 L2A true color, read at 20 m. One pixel is 0.04 ha. A strip narrower than about 40 m can hold skiable snow and show nothing. By mid-September, north-facing cirques sit in shadow at the late-morning overpass, so one zero isn't proof of anything.
Getting there
- Approach
- ~5.5 h · 11 km one way
- Route
- Wild Basin TH, via Ouzel and Bluebird lakes
- Approach from
- Munter rule from straight-line distance and climb, from the first analysis. Rough.
- Route from
- Unverified: written during the first analysis, not by someone who went.
- Terrain from
- From the first analysis: a coarse elevation model at one point. Not checked.
From the ground
No reports for this snowfield yet. Members post what they find on the ground.
Snow on each pass
Hectares of counted snow per pass, as a chart. Grey stubs are passes with cloud over the snowfield.
How we got to this status
- The Oct 7 pass was cloudy over the snowfield (89%), so a cloudy pass counts as no look, not as zero. This uses the Sep 27 pass.
- Sep 27 pass fully covers the snowfield and is clear over it.
- 3 snow pixels in one cluster, which is 0.12 ha.
- Not flagged as possible new snow.
- Down from 0.6 ha on Sep 4, so it's marked Shrinking.
Scan run 7 · status rules 2026.09-2
NDSI > 0.4 · NIR ≥ 0.6 × green · SCL mask · algorithm 2026.09-2
NDSI > 0.4 · NIR ≥ 0.6 × green · SCL mask · algorithm 2026.09-2