Lower Tier (Left Side)
Lower Tier (Left Side) in California has 21 climbing routes with 14 difficulty grades.
- 21 routes
- 5.7 – 5.13a
- Sport · Trad
Is Lower Tier (Left Side) open right now?
Alert in the area
The Forest Service lists 4 alerts for San Bernardino National Forest.
Safety Alert - Falling Rocks at Bonita Falls
Agency alert covering San Bernardino National Forest · USFS · San Bernardino National Forest
Upper Big Falls Area Closure
Agency alert covering Front Country Ranger District · Order 05-12-53-26-03 · USFS · Front Country Ranger District
Fire Restrictions
Agency alert covering San Bernardino National Forest · Order 05-12-00-26-05 · USFS · San Bernardino National Forest
Applewhite Picnic Area Closure
Agency alert covering Front Country Ranger District · Order 05-12-53-26-01 · USFS · Front Country Ranger District
As of · Source: USFS · San Bernardino National Forest. Agencies don't list every closure — check before you go.
Best time to visit Lower Tier (Left Side)
Best months: April–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.
Jan
44° / 29°
6 wet · 1 snow
Feb
45° / 30°
6 wet · 1 snow
Mar
52° / 32°
6 wet · 1 snow
Apr
60° / 36°
4 wet · 1 snow
May
67° / 41°
2 wet
Jun
76° / 49°
1 wet
Jul
81° / 57°
1 wet
Aug
82° / 57°
1 wet
Sep
74° / 52°
1 wet
Oct
63° / 43°
2 wet
Nov
52° / 34°
3 wet
Dec
43° / 29°
5 wet · 1 snow
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Lake Arrowhead, CA, 16.2 mi away at 5,205 ft. The station sits about 500 ft higher than this place, so expect it a little warmer here. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
Lower Tier (Left Side) is a climbing area in the Front Country Ranger District of San Bernardino National Forest in California, managed by the Forest Service. It sits among a cluster of climbing spots, with Middle Tier and Headwall, The both about 0.1 mile away. Summer is the warmest stretch. Typical averages from the Lake Arrowhead weather station, about 16 miles away, show July and August highs in the low 80s with lows near 57°F, while winter brings highs in the low 40s and a few snowy days a month from December through March. Oak Glen Divide is a hike about 1.7 miles away, and the Yucaipa Ridge Truck Trail is about 2.3 miles off. For camping, Thomas Hunting Grounds Yellow Post Sites is about 3.3 miles away, and Barton Flats is about 7 miles away.
Routes (21)
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