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Mammoth Mountain ski resort
Ikon PassView resorts
Tier C — ENSO-proof

📷 Mammoth Mountain

North America

Mammoth Mountain

Closed for the season

Season ended June 7, 2026

Conditions data updated Fri, Aug 28, 09:00 AM UTC · informational only

Closed for the season — closed June 7

Weather data is still collected for informational purposes.

Last Snowfall

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Past 24 Hours

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Past 48 Hours

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Past 10 Days

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14-Day Forecast

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Snow Depth

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🎿

Powder Days

1

2026–27 season

Updated: Aug 28, 9:00 AM•Weather at base: 2424m

Overview

Mammoth Mountain is a ski resort in North America, United States, currently closed for the season (Season ended June 7, 2026). Conditions last updated 2026-08-28 09:00 UTC.

Resort Guide

Mammoth Mountain is a premier ski resort located in California’s Eastern Sierra, offering over 3,500 acres of skiable terrain and a summit elevation of 11,053 feet. The resort features a long winter season, diverse runs for all abilities, modern lift infrastructure, and a vibrant base village with dining, lodging, and après-ski options. Signature experiences include expansive alpine views, terrain parks, and access to year-round mountain activities, making it a standout destination for both winter sports enthusiasts and families.

Resort Info

Summit3369m
Base2424m
Vertical945m
Lifts25
Runs178
Skiable Area3500 acres
Average snowfall400 inches / 1016 cm
CountryUnited States
Visit Resort Website →Follow on Instagram →View Trail Map →

Season dates

Season endedJune 7, 2026

Ski passes

Ikon Pass

Ikon Pass

View resorts →

Access tiers change by season — confirm benefits on the pass operator's site.

Top Après Ski

The Yodler Restaurant & Bar – A classic après-ski spot at Mammoth Mountain, the Yodler is celebrated for its Bavarian-inspired menu, cozy alpine ambiance, and lively outdoor deck, making it a favorite for skiers to unwind with hearty fare and drinks after a day on the slopes.

Snow Summary

3369mECMWF Model

Updated Aug 28, 2026 at 9:00 AM

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24h
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Past 10d
14-Day Forecast
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Prev10d
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Now28
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S29
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S30
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M31
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T1
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W2
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T3
Past
Today
Forecast

Snowfall Forecast Maps

California & Sierra Nevada region

Current Conditions

Reported Fri, Aug 28, 09:00 AM UTC

Depth by source

every reading we have
  • SNOTELMid 0cm

The headline depth uses the most trusted available source. We show every reading so you can judge for yourself.

Base

2424m

Temp

9.5°C

Wind

3.5km/h

Snow Depth

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14-Day Forecast

0cm

Mid-Mountain

2897m

Temp

6.4°C

Wind

3.5km/h

Snow Depth

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14-Day Forecast

0cm

Summit

3369m

Temp

4.7°C

Wind

4.1km/h

Snow Depth

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14-Day Forecast

0cm

El Niño Outlook · Winter 2026-27

Mammoth Mountain El Niño rank & forecast

Mammoth Mountain ranks #249 of 488 SnowSure resorts — Tier C, −3% in strong El Niño winters.

Tier C — ENSO-proof: Strong El Niño winters looked like a normal year here — within about ±3% of this resort’s own 30-year snowfall average. Not a jackpot, not a bust: a hedge if you’re planning around El Niño.

#249 of 488Tier C — ENSO-proof

Strong-event signal: −3% vs this resort's 30-yr avg

In the three strongest El Niño winters on record ('97-98, '15-16, '23-24), Mammoth Mountain averaged -3% versus its own 30-year snowfall baseline — effectively ENSO-proof. Mammoth Mountain has held within a few percent of normal across every phase of the Pacific cycle, making it one of the safest bets of a record El Niño winter 2026-27. Analog winters: '97-98 -4%, '15-16 -32%, '23-24 +27%.

'97-98 −4%'15-16 −32%'23-24 +27%

Signal = average snowfall in the three strongest El Niño winters since 1996 ('97-98, '15-16, '23-24) vs this resort's own 30-year ERA5 baseline. n=3 — a lean, not a law. Updated monthly against measured snowfall Dec–Mar.

Full El Niño report →

Live Conditions

Mammoth Mountain Webcams

All Webcams

Mammoth Mountain

Mammoth Mountain

Mammoth Mountain

Mammoth Mountain

4 webcams • Click to expand

Local Reports

0 reports
SnowSure™ Forecast Range

Daily Snowfall Forecast by Model

Black line = verified SnowSure™ blend (not a simple average). Weights update weekly from measured snowfall at SNOTEL stations and resort reports.

SnowSure™ blend — verified model weighting

The black line is not a simple average. For Mammoth Mountain (sierra), we combine seven global weather models using weights learned from daily forecast verification — comparing each model's prediction to measured snowfall (SNOTEL, resort reports, ERA5).

  • 1.Horizon buckets: days 1–3, 4–7, and 8–14 each get separate weights — short-range skill differs from long-range.
  • 2.Regional calibration: weights come from verified error in this geography (Rockies, Alps, Japan, etc.), recalculated weekly.
  • 3.Ground truth only: we never grade a forecast against another model — only against measured snow.

Building verification history for this resort.

How we verify forecasts →

Hourly Forecast Detail

AM / PM / Night breakdown with wind and freezing level

NWP models refresh up to 4× daily · Last synced Aug 28, 9:00 AM

Hourly Forecast Detail
 
Today
12 / 46.6mm
Sat, Aug 29
12 / 31.5mm
Sun, Aug 30
12 / 2
Mon, Aug 31
12 / 2
Tue, Sep 1
9 / 0
Wed, Sep 2
12 / 0
PeriodAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Snow (cm)000000000000000000
Precip (mm)06.30.30.31.20000000000000
Temp (°C)81057114712371135916112
Wind (km/h)9207112077134616491669177
Gusts (km/h)377435366031234117195328405946334941

14-Day Snow Forecast by Model

Summit elevation (3369m)

ECMWF
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GFS
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JMA
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ICON
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Météo-Fr
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SnowSure™
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10-Day Forecast

Today

28

🌧️

12°

4.4°

22 km/h

Sat

29

🌧️

11.7°

3°

21 km/h

Sun

30

🌤️

12.4°

1.5°

14 km/h

Mon

31

☀️

12.2°

2°

17 km/h

Tue

1

☀️

9.3°

-0.2°

17 km/h

Wed

2

☀️

11.7°

-0.3°

18 km/h

Thu

3

☀️

11.8°

-0.9°

25 km/h

Fri

4

🌤️

10.8°

1.3°

23 km/h

Sat

5

☁️

13.5°

0.5°

16 km/h

Sun

6

⛅

15.9°

3.2°

17 km/h

Summit elevation (3369m) • ECMWF model

Avalanche

Off-season — no rating published

Eastern Sierra Avalanche Center

Watch for signs of unstable snow such as recent avalanches, cracking in the snow, and audible collapsing. Avoid traveling on or under similar slopes.

Read the official bulletin ↗

SnowSure relays the official avalanche bulletin and does not issue avalanche forecasts. Read the full bulletin at the issuer’s link and make your own terrain decisions. Not a substitute for avalanche education, equipment, or local knowledge.

Getting There

Drive times & access

Last updated Apr 22, 11:54 AM

5 cameras nearby

Official map ↗

Drive conditions

Quiet — No winter restrictions — typical off-season pavement

The SnowSure call indicates a quiet status with no winter restrictions and typical off-season pavement conditions near Mammoth Mountain. There are currently no active chain controls or closures on the highways monitored by SnowSure. The readings reflect late-season or summer conditions, which are not indicative of winter forecasts. It is essential to check the resort road status and the official DOT map for authoritative information before driving.

SnowSure take, grounded in live DOT sensors. Not the resort's road status.

Highway cameras near Mammoth Mountain

SR-203 : Mammoth Mountain road camera
SR-203 : Mammoth Mountain10.1 km · Caltrans
US-395 : Crestview road camera
US-395 : Crestview14.2 km · Caltrans
US-395 : Obsidian Dome road camera
US-395 : Obsidian Dome16.2 km · Caltrans
US-395 : McGee Creek Road road camera
US-395 : McGee Creek Road22.3 km · Caltrans
US-395 : Crowley Lake road camera
US-395 : Crowley Lake27.1 km · Caltrans

Live highway sensors & cameras within ~30–40 km, via Caltrans. Conditions on the drive, not the mountain — the resort's own road status is authoritative. Always re-check before a winter drive.

Season vs Historic

Updated Fri, Aug 28, 09:00 AM UTC

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Season Total

This Season to Date

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vs 5-Year Avg

Off-season · 609cm full-season avg

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vs 30-Year Avg

Off-season · 393cm full-season avg

609cm

5-Yr Avg by Now

The last completed season totaled ~456.8 cm. That's 25% below the 5-year average (609 cm). Versus the 30-year baseline: 16% above the 30-year average (393 cm).

Mammoth Mountain Snow History

Average annual snowfall is 434cm with an average of 78 snowfall days per season. The table below shows monthly averages across 30 seasons of archive data (modeled snowpack at mid-elevation).

Average monthly snowfall history
MonthAvg SnowfallSnowfall DaysAvg Base DepthMax Base DepthBiggest Snowfall
November39.5cm8 days12cm31cm17.4cm
December83.7cm12 days46cm80cm23.5cm
January86.9cm11 days86cm122cm25.2cm
February88.4cm13 days115cm150cm23.5cm
March72.7cm12 days132cm158cm22.1cm
April33.4cm10 days116cm140cm12.5cm
May13.8cm6 days70cm98cm7.1cm

Source: SnowSure archive · Open-Meteo ERA5 reanalysis at mid-elevation. Depth is modeled, not resort-reported.

Season at a Glance

1 tracked season

Last completed season(2025-26)

200 days

Nov 20, 2025 → Jun 7, 2026

Next season(2026-27)

Opens Nov 14, 2026

Multi-season averages will appear once SnowSure has tracked more than one full season.

ENSO seasonal analog

History · not a forecast

In 10 past El Niño winters at Mammoth Mountain, ERA5 season snowfall median was 380 cm (150 in), about 6% above this resort’s long-term median. This is a historical analog from reanalysis — not a prediction of this winter’s storm track.

Prevailing ONI

El Niño

MJJ 2026 · ANOM +1.39°C

Analog season median

380 cm

10 El Niño winters · 6% above median

All-season median

360 cm

Across 30 ERA5 seasons (2026-27)

PhaseSeasonsMedianp25–p75Recent analogs
El Niñocurrent10380 cm284 cm – 452 cm2023, 2019, 2018, 2015, 2014, 2009
La Niña12355 cm297 cm – 524 cm2022, 2021, 2020, 2017, 2011, 2010
ENSO-neutral8306 cm227 cm – 526 cm2025, 2024, 2016, 2013, 2012, 2003

Season snowfall from Open-Meteo ERA5 reanalysis (~9 km). ENSO phase from NOAA CPC Oceanic Niño Index. Relative phase differences are more trustworthy than absolute cm totals. Source: NOAA CPC Oceanic Niño Index + Open-Meteo ERA5 via SnowSure season archive.

Best Months to Visit

February

Peak Season

January

Peak Season

March

Good

December

Good

Note: Based on typical ski season patterns for this region.

Back to All Destinations

Frequently asked questions about Mammoth Mountain

Where is Mammoth Mountain?
Mammoth Mountain is a ski resort in the United States.
How high is Mammoth Mountain?
Mammoth Mountain runs from a base elevation of 2,424 m (7,953 ft) to a summit of 3,369 m (11,053 ft), giving a vertical drop of 945 m (3,100 ft).
How big is Mammoth Mountain?
Mammoth Mountain has 3,500 acres (1,416 hectares) of skiable terrain, 178 marked runs and 25 lifts.
Which ski pass covers Mammoth Mountain?
Mammoth Mountain is on the Ikon Pass. Access terms such as blackout dates and day limits vary by pass tier, so check the pass operator for the current season.
When is ski season at Mammoth Mountain?
Mammoth Mountain typically operates from November to June. Exact opening and closing dates shift each year with snowfall — check the resort's current season dates before booking.
How much snow does Mammoth Mountain get in a typical season?
Mammoth Mountain averages 400 inches / 1016 cm of snowfall in a typical season. Any individual season can run well above or below that.
How will El Niño affect Mammoth Mountain in winter 2026-27?
El Niño Signal Rank: #249 of 488 SnowSure resorts · Tier C · strong-event signal -3% vs its own 30-yr average. In the three strongest El Niño winters on record ('97-98, '15-16, '23-24), Mammoth Mountain averaged -3% versus its own 30-year snowfall baseline — effectively ENSO-proof. Mammoth Mountain has held within a few percent of normal across every phase of the Pacific cycle, making it one of the safest bets of a record El Niño winter 2026-27. Analog winters: '97-98 -4%, '15-16 -32%, '23-24 +27%.