The 2025 event has concluded.

Mt. Umunhum Trail Marathon

San Jose, CA, USA • February 1, 2025
TopDescriptionCourseCommunity

Subscribe

Get updates on the Mt. Umunhum Trail Marathon race forecast and be the first to know if the forecast shifts.

Text Updates

Maximum one update per day. Standard messaging rates apply. Currently only supports USA, UK, and Canada.

Phone Number

Email Updates

By submitting your email you agree to receive weather forecasts and racecast.io updates.

rain Cloudy skies throughout the day with morning rain.

The best Garmin gifts for the runner in your life. Garmin Holiday Gift Guide.When you buy through our links, we may earn a commission.

Area Map

Course Maps

FAQ

Ask a Question about the Mt. Umunhum Trail Marathon

Racecast Concierge (free during beta)

Ask a question about the Mt. Umunhum Trail Marathon and we'll do the hard part and find the answer for you within 48 hours.

By using Racecast Concierge, you agree to receive email alerts pertaining to the Mt. Umunhum Trail Marathon and general racecast.io updates.

When is the 2025 Mt. Umunhum Trail Marathon?

The 2025 Mt. Umunhum Trail Marathon will be held on Saturday February 1, 2025.

Is the Mt. Umunhum Trail Marathon a Boston Marathon Qualfier?

No, the Mt. Umunhum Trail Marathon is NOT a Boston Marathon qualifier.

Community

You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR

Historical Weather & Results

RunScore
Run Score: 8
Temp
61°F
Min/Max
46°/62°F
Dew
43°F
Days of Rain
0/3
Wind
9mph
Tap a row for details.
YearLow / HighRainResults

Mt. Umunhum Trail Marathon 2024 Weather History

Cloudy skies throughout the day with late afternoon rain.

2024
cloudy
48°/ 58°-
Run Score: 9

Mt. Umunhum Trail Marathon 2023 Weather History

Cloudy skies throughout the day with rain.

2023
partly-cloudy-night
49°/ 65°-
Run Score: 7

Mt. Umunhum Trail Marathon 2022 Weather History

Partly cloudy throughout the day.

2022
partly-cloudy-night
41°/ 62°-
Run Score: 8
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR