California · Rock climbing · Yosemite National Park

Black Fly

Among the most difficult climbs at Public Sanitation Wall.

5.13
grade
Sport Bolted
style

Is Black Fly open right now?

No closures listed

The National Park Service lists no closures for Yosemite National Park.

As of · Source: NPS · Yosemite National Park. Agencies don't list every closure — check before you go.

Best time to visit Black Fly

Best months: March–June and September–November. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.

  1. Jan

    48° / 29°

    9 wet

  2. Feb

    51° / 30°

    9 wet

  3. Mar

    57° / 33°

    10 wet

  4. Apr

    63° / 38°

    8 wet

  5. May

    70° / 45°

    6 wet

  6. Jun

    80° / 51°

    3 wet

  7. Jul

    89° / 57°

    1 wet

  8. Aug

    89° / 57°

    1 wet

  9. Sep

    83° / 51°

    2 wet

  10. Oct

    71° / 41°

    3 wet

  11. Nov

    56° / 32°

    6 wet

  12. Dec

    46° / 28°

    8 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Yosemite Park Hq, CA, 0.8 mi away at 4,018 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

One of the hardest routes catalogued at Public Sanitation Wall, where climbs range from 5.10a/b to 5.13 across 22 established lines.

Photo of the crag

Public Sanitation Wall — the crag this route is on
Public Sanitation Wall, California — this photo shows the crag, not this individual route.Photo: Eric Kilby, CC BY-SA 2.0 (via Flickr)

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