California · Rock climbing · Santa Clarita

Addendum to the Guidebook

Addendum to the Guidebook is a California climbing crag with 10 sport routes.

10 routes
5.6 – 5.12a
Sport

Is Addendum to the Guidebook open right now?

Alert in the area

The Forest Service lists 7 alerts for Angeles National Forest.

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

Best time to visit Addendum to the Guidebook

Best months: October–May. 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

    56° / 38°

    7 wet

  2. Feb

    58° / 39°

    7 wet

  3. Mar

    63° / 43°

    7 wet

  4. Apr

    68° / 46°

    4 wet

  5. May

    76° / 53°

    2 wet

  6. Jun

    86° / 62°

    1 wet

  7. Jul

    92° / 68°

    1 wet

  8. Aug

    93° / 68°

    1 wet

  9. Sep

    88° / 62°

    1 wet

  10. Oct

    77° / 53°

    2 wet

  11. Nov

    65° / 44°

    3 wet

  12. Dec

    55° / 37°

    5 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Fairmont, CA, 13.3 mi away at 3,060 ft. The station sits about 700 ft higher than this place, so expect it a little warmer here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Addendum to the Guidebook is a climbing area in the Los Angeles Gateway Ranger District of Angeles National Forest in California, managed by the Forest Service. Spring and fall are the most comfortable times to visit. Typical averages from a nearby weather station at Fairmont show May highs around 76°F and October highs around 77°F, with fewer wet days than the cooler months. Summer is hot, with July and August highs near 92 to 93°F. Several climbing areas sit right next door, including Temple of Ishtar, Tower of Babel, Panhandle, The and Hatchery, The, each about 0.1 mile away. For a change from climbing, Rosa Canyon Truck Trail is about 1.6 miles off, and Zuni Campground is about 2.9 miles away.

Routes (10)

G. The Panhandle(1)

Biscuit5.8

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