Trail
50K Ultra
50 km
Start: Sep 28, 03:00 AM
155.00 EUR
Mt. Disappointment Mountain Race
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Trail in United States, Los Angeles
Distances
Trail
25K Challenge
25 km
Start: Sep 28, 03:00 AM
130.00 EUR
About
A trail ultra in the Angeles National Forest offering a 25K and a 50K distance with marked courses, fully stocked aid stations, and panoramic mountain scenery.
Catering & aid stations
Fully stocked aid stations every 5–7 miles on the course.
Pacers
No pacers are allowed on the course; pacers are not permitted for any distance.
Results
View official resultsTypical weather in Los Angeles
Monthly averages based on historical data (2000–present).
Jan53°35°
↑ 06:59
↓ 17:05
Feb53°35°
↑ 06:39
↓ 17:36
Mar56°37°
↑ 07:03
↓ 19:01
Apr61°40°
↑ 06:21
↓ 19:24
May68°46°
↑ 05:51
↓ 19:48
Jun77°54°
↑ 05:41
↓ 20:07
Jul83°61°
↑ 05:52
↓ 20:05
Aug83°61°
↑ 06:15
↓ 19:40
Sep78°56°
↑ 06:37
↓ 19:00
Oct69°49°
↑ 06:59
↓ 18:19
Nov60°41°
↑ 06:27
↓ 16:49
Dec53°36°
↑ 06:52
↓ 16:45
What's included in entry
- 25K Challenge
- 50K Ultra
- Finisher medal
- Tech race shirt
Prices & signup
- 25K Challenge130.00 EUR
- 50K Ultra155.00 EUR
FAQ
What is the race start time?
Race start is 7:00 AM on Saturday, September 26, 2026 at the summit of Mt. Wilson (Mt. Wilson Observatory parking lot).
Are drop bags allowed?
No; drop bags are not permitted at any aid stations.
Are pacers allowed?
No; pacers are not allowed on the course.
What aid is available on course?
Fully stocked aid stations every 5–7 miles with water and supplies.
What should I bring for race day?
Carry additional water between Josephine Saddle and RedBox, and bring required gear for mountain trail conditions.
Last updated: Jun 6, 2026, 12:30:55 AM
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