New Mexico · Rock climbing · Los Alamos

45° Boulder

45° Boulder in New Mexico has 14 routes spanning 11 difficulty grades, offering sport and trad climbing.

14 routes
5.10 – 5.14a
Sport · Trad

Is 45° Boulder open right now?

Alert in the area

The Forest Service lists an alert for Espanola Ranger District.

  • Headquarters Well Area Closure on Española Ranger District

    Agency alert covering Espanola Ranger District · Order 03-10-06-25-17 · USFS · Espanola Ranger District

As of · Source: USFS · Espanola Ranger District. Agencies don't list every closure — check before you go.

Best time to visit 45° Boulder

Best months: April–June and September–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

    40° / 21°

    6 wet

  2. Feb

    45° / 24°

    6 wet

  3. Mar

    53° / 30°

    7 wet

  4. Apr

    61° / 35°

    6 wet

  5. May

    70° / 44°

    6 wet

  6. Jun

    81° / 53°

    7 wet

  7. Jul

    83° / 57°

    13 wet

  8. Aug

    80° / 55°

    14 wet

  9. Sep

    74° / 49°

    9 wet

  10. Oct

    63° / 38°

    6 wet

  11. Nov

    50° / 28°

    5 wet

  12. Dec

    40° / 21°

    6 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Los Alamos, NM, 2 mi away at 7,424 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

45° Boulder is a climbing area in New Mexico, on Forest Service land within the Espanola Ranger District of the Santa Fe National Forest. It sits among several other climbing spots, with Main Wall, The Dungeon and Trash Tower all within a tenth of a mile, and Pajarito Canyon and Nail Trail just beyond. The area is known for its sport climbing, with 13 sport routes and one trad route among its 14, and grades range from 5.10 to 5.14a. The hardest of these is Miss Jackson, a 5.14a sport route, while Disenchantment, at 5.10, is the easiest. Black Tar is the sole trad route at 5.12c. Spring and fall bring the most comfortable conditions. Typical averages from a nearby weather station in Los Alamos show May highs around 70°F and October highs around 63°F, while July and August average about 13 to 14 wet days a month. That station sits about 433 feet lower than the climbing area, so temperatures here run a bit cooler. The closest neighbors are Main Wall and The Dungeon, along with the Pajarito Canyon and Nail Trail hikes. Cañon de Valle Boulders lies about a mile and a quarter away.

Routes (14)