
Manker Flat
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San Gabriel Mountains
01 · The call
Good with cautionWhy now
One of the better months for summit hike or high-elevation training day here.
Watch out
Extreme Heat Watch issued August 23 at 12:06AM PDT until August 28 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Plan B
Keep the trip anchored around Claremont or Ontario foothill side with a shorter loop through Manker Flat and Ski Hut Trail.
Why now
One of the better months for summit hike or high-elevation training day here.
Watch out
Extreme Heat Watch issued August 23 at 12:06AM PDT until August 28 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Plan B
Keep the trip anchored around Claremont or Ontario foothill side with a shorter loop through Manker Flat and Ski Hut Trail.
02 · The story

baldy objective guide
Mt. Baldy, or Mount San Antonio, is the Southern California mountain that looks deceptively close to the city while still behaving like a real high-elevation objective.
Photo: Laura CampCC BY-SA 2.0Source
baldy objective guide
Mt. Baldy, or Mount San Antonio, is the Southern California mountain that looks deceptively close to the city while still behaving like a real high-elevation objective.
Photo: Laura CampCC BY-SA 2.0Source
04 · The window
05 · The conditions
Current weather
76F day, 61F night
1% chance of rain
15 mph wind
Nearest town: Los Angeles
Updated Aug 23, 2026, 12:12 PM
06 · On the ground
Access
Before you go
Road and weather data checked Aug 23, 2026, 12:12 PM
Next step
Field notes
Devil's Backbone is exposed and narrow. The Devil's Backbone is a narrow ridge with big drop-offs on both sides.
In winter this is mountaineering, not hiking. From late fall through spring and even early summer, Baldy can hold ice and needs mountaineering judgment.
03 · Highlights
Selected stop
Baldy Bowl
A serious winter or shoulder-season zone where snow and ice skills can change the decision entirely.
Photo: Darkest treeCC BY-SA 4.0Source
Across the park

Mt Baldy Village
89° · 4,200 ft
Icehouse Canyon
86° · 5,000 ft
Manker Flats
78° · 6,160 ft
San Antonio Falls
82° · 6,400 ft
Baldy Notch
78° · 7,802 ft
Devil's Backbone
71° · 8,600 ft
Cucamonga Peak
73° · 8,859 ft
Mt Baldy Summit
65° · 10,064 ft
Across the park
About 24° colder up high — Mt Baldy Village 89°, Mt Baldy Summit 65°.
Across the park · by elevation
Temp · wind

Mt Baldy Village
89° · 4,200 ft
Icehouse Canyon
86° · 5,000 ft
Manker Flats
78° · 6,160 ft
San Antonio Falls
82° · 6,400 ft
Baldy Notch
78° · 7,802 ft
Devil's Backbone
71° · 8,600 ft
Cucamonga Peak
73° · 8,859 ft
Mt Baldy Summit
65° · 10,064 ft
Mt Baldy Village 89° · Mt Baldy Summit 65° — colder up high.
Official alerts
Last checked
Aug 23, 2026, 12:12 PM
* WHAT...For the Heat Advisory, temperatures up to 107 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 112 possible. * WHERE...A portion of southwest California. * WHEN...For the Heat Advisory, from 10 AM this morning to 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.
* WHAT...For the Heat Advisory, temperatures up to 107 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 112 possible. * WHERE...A portion of southwest California. * WHEN...For the Heat Advisory, from 10 AM this morning to 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.
Effective July 24, 2026, fire danger levels have increased to “VERY HIGH” at the Angeles National Forest. The forest has taken this step to enhance public awareness that wildfire probability increases as temperatures rise and vegetation dries out. Despite the change, there are no new campfire… Forest Order: #Forest Order No. 05-01-26-12.
Hikers and equestrians along the Pacific Crest Trail may be affected by a temporary closure of the Williamson Rock area of the Angeles National Forest. This closure (Forest Order No. 05-01-24-04), in effect through December 31, 2026, is for the protection of natural resources, specifically the… Forest Order: #05-01-24-04.
HUGO is an active wildfire roughly 9 miles from Mt Baldy. Current incident context: Los Angeles County.
LAC-298861 is an active wildfire roughly 17 miles from Mt Baldy. Current incident context: Los Angeles County. Official incident label: LAC-298861.
LAC-297933 is an active wildfire roughly 19 miles from Mt Baldy. Current incident context: Los Angeles County. Official incident label: LAC-297933.

Southern Desert
Anza-Borrego