California · Rock climbing · Markleeville

Seam Slab #1

Seam Slab #1 is a bouldering area in California with 6 routes.

6 routes
V0 – V3
Bouldering

Is Seam Slab #1 open right now?

Closure in the area

There's a closure order in Stanislaus National Forest. It doesn't name Seam Slab #1, so check the source for the area it covers (2 listed).

As of · Source: USFS · Stanislaus National Forest. Agencies don't list every closure — check before you go.

Best time to visit Seam Slab #1

Best months: May–October. 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

    45° / 30°

    11 wet

  2. Feb

    46° / 30°

    11 wet

  3. Mar

    49° / 32°

    11 wet

  4. Apr

    54° / 35°

    8 wet

  5. May

    63° / 42°

    6 wet

  6. Jun

    73° / 49°

    2 wet

  7. Jul

    81° / 56°

    1 wet

  8. Aug

    80° / 55°

    1 wet

  9. Sep

    74° / 51°

    2 wet

  10. Oct

    64° / 43°

    4 wet

  11. Nov

    52° / 34°

    7 wet

  12. Dec

    44° / 30°

    11 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Calaveras Big Trees, CA, 17.4 mi away at 4,695 ft. The station sits about 1,500 ft lower than this place, so expect it a little cooler here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Seam Slab #1 is a bouldering area in the Calaveras Ranger District of Stanislaus National Forest in California, managed by the Forest Service. It sits among a cluster of climbing and camping spots, with Stanislaus River Campground and the Warm-up Wall both about 0.1 mile away. The area has six bouldering routes, all rated between V0 and V3 on the V scale. The easiest is Jug Seam #1 at V0, and the hardest is Better Bring Your Hairbrush at V3. The routes include Moss Pocket at V1-2 and THE BEST Slab Problem at V2. Summer is the most comfortable time to visit. Typical averages from a nearby weather station at Calaveras Big Trees show July highs around 81°F with lows near 56°F and only about one wet day in the month. That station sits roughly 1,500 feet lower than the slab, so temperatures here run cooler. Nearby, Cow Camp is a hike about 0.9 mile away, and Utica Rocky Point campground is about 1.9 miles off. Utica/Union Reservoirs and Spicer Reservoir, both fishing spots, are within about 3 miles.

Routes (6)