Mountain Peak

Mount Islip peak

Central And Southern California Ranges, California 8,250 ft
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Range
Central And Southern California Ranges
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Mount Islip rises to 8,250 ft in Pacific-Ranges within the Central And Southern California Ranges range.

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.

For trail conditions and access, search Wikipedia or the local land manager's site. Browse other peaks in the Pacific-Ranges range.

StateCALIFORNIA
RangeCentral And Southern California Ranges
Elevation8,250 ft
Latitude34.3450°
Longitude-117.8400°
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Regional streamflow

Streamflow near Mount Islip

USGS streamgauges in the basin drained by this peak. Spring snowmelt from the summit feeds these flows.

Detailed forecast

Plan around incoming weather

Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column -- snow at this elevation typically lags the radar signature by a few hours.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

5-day forecast table

Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day forecast

Daily temperatures, snow, and rain projected over the next two weeks.

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Get Mount Islip on your phone.

Save this peak as a favorite and get push alerts when storms move in, fresh snow falls upstream, or NWS issues a weather warning. Free, account optional.

Snoflo app icon
QR code -- scan with your iPhone to install Snoflo

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Snoflo Premium

Favorites and custom weather alerts are part of Snoflo Premium. Save peaks, set snowfall or wind thresholds, and get push alerts when conditions cross.

Set up an alert

Custom alerts are configured in the Snoflo iOS app. Open the app, navigate to this peak, and tap the bell icon to set thresholds for snowfall, temperature, or wind.

{# FAVORITE-LIMIT MODAL — fires when a non-premium user hits the 3-favorite cap. Mirrors the iOS PremiumGateSheet's .bookmarkLimit case: same copy direction (limit reached → unlimited with Premium), same primary CTA shape. Triggered from toggle_fave (pre-flight) and the 403 error handler. #} {# ALERTS-IN-APP MODAL — opened from the Account dropdown's "Alerts" link. Push-notification alerts (snow / flow / buoy / ski) are managed in the iOS app because they require APNs + device tokens; the webapp has no equivalent surface, so the right thing to do is point users at the App Store. Mirrors the per-gauge #sf-cp-alerts-modal popup on recChildFlow.html. #}