Manker Flat

General Information
Other Web Information

General Information

Manker Flat (6,300') is in San Antonio Canyon near the base of Thunder Mountain.

Manker Flat has a campground with flush toilets, open from May to October with 22 sites suitable for tents and RVs up to 22' in length. It is a good location for an overnight stay to acclimatize oneself before a hike to Mt. Baldy.

In the winter, it is an excellent place to bring children to play in the snow. In the fall, the whole area is emblazoned by the golden leaves of the bigleaf maples that grow in abundance there.

Manker Flat was named for Fletcher Manker, an Upland businessman. It is spelled "Flat" on the USGS topo sheets and "Flats" by the US Forest Service.


Map: Mt. Baldy Region (MF near the center of the map)
See also: USGS 7.5' x 7.5' Map: Mount San Antonio (34° 15' 56" N, 117° 37' 48" W) and Telegraph Peak

By Car: From I-10, drive north on Mountain Avenue, State Route 83, from Upland or from I-210, take Foothill Boulevard east to Mills Avenue, from there north to Mt. Baldy Road. From where Mt. Baldy Road meets Mountain Avenue coming in from Upland to the east, it is 9.1 miles up canyon to San Antonio Falls Road in Manker Flat. For some reason unknown to us, the intersection of Mt. Baldy Road and Mountain Avenue, just above San Antonio Dam, is signed Shinn Road. ("Shinn Road" is not in the 2000 Thomas Brothers Map!) Shinn Road was the site of a major fire in September 1999. Glendora Mountain Road comes in from San Gabriel Canyon to the west at Baldy Village.

By Trail: From San Antonio Falls, the San Antonio Ski Hut, and Baldy Notch via the gated ski lift access road, marked San Antonio Falls Drive, north of the campground on the west side of the divided road.

Season: Any


Warning: This list does not get updated as often as the hikes listed in the region tables. Consult Mt. Baldy Region Hikes for the latest listing.

91133500jun-octManker Flat to Baldy Notch, Devils Backbone, Mt. San Antonio
91.172200jun-octManker Flat to Baldy Notch, Devils Backbone, Mt. San Antonio Using Ski Lift
91.21.2250jun-octManker Flat to San Antonio Falls
91.352200jun-octManker Flat to Sierra Club's San Antonio Ski Hut
91.48.43900jun-octManker Flat to Mount San Antonio via Ski Hut
(1 way)
jun-octManker Flat to Mount San Antonio, Pine Mountain, Wrightwood via Ski Hut
jun-octManker Flat to Baldy Notch, Thunder, Telegraph, Timber Mtns., Icehouse Saddle, Icehouse Canyon via San Antonio Falls Road

Other Web Information

Go to Field Guide to the San Gabriel Mountains: Places

Copyright © 1999 by Jane Strong and Tom Chester
Permission is freely granted to reproduce any or all of this page as long as credit is given to us at this source:
Comments and feedback: Jane Strong | Tom Chester
Updated 12 November 1999.