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Pacific Ranges Central and Southern California Ranges

Mount Islip

8,250 ft

Mount Islip is a prominent peak located in the Pacific Ranges mountain range in Southern California. Standing at an elevation of 8,250 feet, it offers breathtaking views of the surrounding San Gabriel Mountains. Spanning over 3,000 acres, Mount Islip is a popular destination for hikers, mountaineers, and nature enthusiasts.

During the winter season, Mount Islip receives a substantial amount of snowfall, transforming it into a winter wonderland. Snowpack depths can vary widely, ranging from a few inches to several feet depending on the severity of the winter storms. This makes it an ideal location for winter sports such as snowshoeing and backcountry skiing.

Several creeks and rivers are fed by the runoff from Mount Islip. These include Little Jimmy Creek, Crystal Lake Creek, and South Fork Big Rock Creek. These water sources provide vital resources for the surrounding ecosystems and contribute to the overall biodiversity of the area.

The name "Islip" is believed to have originated from the early Spanish settlers who named the mountain after the town of Islip in Suffolk, England. The mountain holds a rich history, including Native American settlements and the exploration efforts of early European settlers.

In conclusion, Mount Islip in the Pacific Ranges mountain range is a majestic peak with an elevation of 8,250 feet. It offers diverse recreational opportunities throughout the year, including winter sports due to its substantial snowpack range. With its numerous creeks and rivers, it plays a significant role in the local ecosystem. The name holds historical significance and reflects the early Spanish influence in the region.


Outdoor Recreation

Campground Campsites Reservations Toilets Showers Elevation
Bohelli Regional Park None 1,107 ft
Coldbrook 20 3,285 ft
Horse Flats 25 5,639 ft
Prado Regional Park 75 553 ft
Appletree 8 6,111 ft
Guffy 6 8,219 ft
Table Mountain 111 7,161 ft
Saddleback Butte State Park 50 2,609 ft
Devore 6 2,914 ft
Sycamore Flats 12 4,411 ft
Crystal Lake Rec Area 191 5,689 ft
Mt. Pacifico 9 7,092 ft
Glenn Camp 8 2,095 ft
Lupine 11 6,551 ft
Cabin Flat 11 6,690 ft
Big Rock 8 5,417 ft
Southfork 21 4,557 ft
Chilao 111 5,333 ft
Manker 21 6,015 ft
Mountain Oak 17 6,203 ft
Lake 8 6,129 ft
Little Jimmy 16 7,419 ft
Chino Hills - State Park 20 480 ft
Ski Area Snowpack Air Temperature 5 Day Forecast
Mt. Baldy Ski Lifts " ° "
Mt. Waterman " ° "
Buckhorn Ski Club " ° "
Mount Baldy " ° "
Mountain High Resort " ° "
Sunrise " ° "
River Run Streamflow Length Class

Regional Water Data

Gauge Streamflow Stage
Temescal C Ab Main St A Corona Ca
USGS 11072100
14 cfs 2.9 ft
Fullerton C Bl Fullerton Dam Nr Brea Ca
USGS 11089500
1 cfs 3.3 ft
Brea C Bl Brea Dam Nr Fullerton Ca
USGS 11088500
2 cfs 1.2 ft
Coyote C Nr Buena Park Ca
USGS 11089200
1 cfs 10.1 ft
Santa Ana R Bl Prado Dam Ca
USGS 11074000
303 cfs 3.3 ft
Carbon C Bl Carbon Cyn Dam Ca
USGS 11075720
0 cfs 2.1 ft
Fullerton C Nr Buena Park Ca
USGS 11090400
0 cfs 1.2 ft
Snotel Site Snowpack 24hr Change

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