Hike Conditions

San Gorgonio (Old Greyback)

11,503 ftSan Bernardino MountainsSan Bernardino National ForestEstimate updated 42 min ago
We found no Forest Service alert naming San Gorgonio's trails and no weather warning for the summit (checked 42 min ago). Closures can be posted at any time: check the forest's alerts page before you go.
Worst case on the way up, next 24 hours

No snow or ice expected on the trail in the next 24 hours. Mountain weather changes within hours: check the forecast and the newest reports before you leave.

About 7.5 in of snow is forecast at the summit in the next 2 days; about 0.6 in of rain is forecast near the summit in the next 2 days, and rain that freezes turns to ice; nights at the summit go down to about 30 °F.

Planning ahead? From Sat, Oct 10, 11:00 AM, it gets worse

Ice or hard snow likely above about 9,000 ft. On the section "around 9,000 ft", that means crampons, ice axe and helmet, and the training to use them. Without them, turn around below 9,000 ft.

About 7.5 in of snow is forecast at the summit in the next 2 days; about 0.6 in of rain is forecast near the summit in the next 2 days, and rain that freezes turns to ice; nights at the summit go down to about 30 °F.

CramponsIce axeHelmetTraining to self-arrest

Trail sections

Trail sections for Vivian Creek and South Fork are coming. Until then: the upper mountain has been "a sheet of ice" in past searches; above Halfway Camp on Vivian Creek, crampons have been needed.

By elevation

Snow on the ground now; gear for the next 24 hours

ElevationSnow nowSurfaceNeed
11,503
none
No snow on the groundNo snow expected
11,500
none
No snow on the groundNo snow expected
11,000
none
No snow on the groundNo snow expected
10,500
none
No snow on the groundNo snow expected
10,000
none
No snow on the groundNo snow expected
9,500
none
No snow on the groundNo snow expected
9,000
none
No snow on the groundNo snow expected
8,500
none
No snow on the groundNo snow expected
8,000
none
No snow on the groundNo snow expected
7,500
none
No snow on the groundNo snow expected
7,000
none
No snow on the groundNo snow expected
6,500
none
No snow on the groundNo snow expected
6,000
none
No snow on the groundNo snow expected
5,500
none
No snow on the groundNo snow expected
How we got this, at the summit
Tue 10-06 35 to 52 °F. On the ground: 0 in.
Wed 10-07 36 to 53 °F. On the ground: 0 in.
Thu 10-08 37 to 54 °F. On the ground: 0 in.
Fri 10-09 35 to 51 °F. On the ground: 0 in.
Sat 10-10 (forecast)+0.3 in snow. 0.05 in rain. −0.3 in melted (we count 90%). 33 to 43 °F. On the ground: 0 in.
Sun 10-11 (forecast)+7.2 in snow. 0.54 in rain. −1.1 in melted (we count 90%). 30 to 39 °F. On the ground: 5.1 in.

Model 1.0: National Weather Service grid SGX 79,72 (fetched 42 min ago) and Open-Meteo (fetched 42 min ago), corrected to each elevation. How it works

At the summit: 3 days back, 2 ahead32 °FTueWedThuFri0.3″Sat*7.2″Sun*
New snowRainNight low* forecast

Check these before you go

From hikers on the mountain

Soon you'll be able to tell us what you saw, by voice or photo, and a fresh report will beat our estimate for that spot.

Until then, the newest posts in the links on the left are the best ground truth. Check the date on every one: anything from before the last storm is out of date.

If the page says crampons, ice axe and helmet

CramponsNot microspikes: rescuers say most recent deaths involved microspikes on steep ice. Fit them to your boots at home.
Ice axeAnd the skill to self-arrest. Practise on a safe slope with a course before you need it.
HelmetA climbing helmet. Falls here end on rocks.
Satellite messengerMuch of the mountain has no cell signal.
A turn-around timeDecide it before you start, and keep it.

What this estimate can't see

  • This is a model, not an observation. A 1 °C error moves the snow line about 500 ft.
  • It cannot see one shaded chute or a boot-packed icy track. Treat any shade as icier than shown.
  • After the first storms of the season, thin ice on rock is common and hard to see. We lean on the side of more gear.
Estimates come from weather models and can be wrong. They are a safety check, not permission to go. You are responsible for your own safety. In an emergency call 911.Weather data: National Weather Service, NOAA, and Open-Meteo (CC BY 4.0). Closures: USDA Forest Service.How the estimate worksSafety notice and termsPrivacyA free Hidden Planet project