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| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| Kid's Run (6yo & younger, 50yd dash) - Free! | Kids | Nov 7, 20268:20 AM | Free | – |
| 30K | Other | Nov 7, 20268:30 AM | $75$85 after Nov 1, 2026 | – |
| 50K | 50K | Nov 7, 20268:30 AM | $90$100 after Nov 1, 2026 | – |
| Half Marathon | Half Marathon | Nov 7, 20268:30 AM | $70$80 after Nov 1, 2026 | – |
| Marathon | Marathon | Nov 7, 20268:30 AM | $80$90 after Nov 1, 2026 | – |
| Coastal Testing | Other | Nov 7, 20268:35 AM | Free | – |
| 8K | 8K | Nov 7, 20268:45 AM | $60$70 after Nov 1, 2026 | – |
| 5K | 5K | Nov 7, 20269:00 AM | $25 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The Other fee goes up to $85 on Nov 1, 2026.
Online registration closes Nov 7, 2026, unless the race fills first.
At $90, entry is about 10 percent below a typical 50K in California, which costs $99.50 right now.
A typical finisher at a 50K in California runs 6:35:17, about 12:43 a mile, based on 20 races with published results. Women typically finish in 6:53:54 and men in 6:30:53.
Sunrise on race morning is at about 6:39 AM, and the Kid's Run (6yo & younger, 50yd dash) - Free! starts at 8:20 AM. The start sits about 640 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Lake Chabot Regional Park - Marina, Castro Valley, CA 94546
The pin marks the address the race lists, which is usually the start. Course maps are the organizers' own.
Aggregated from official results (Coastal Trail Runs) for Lake Chabot Trail Run. Individual finisher names are not stored here.
At the 2025 Half Marathon, the fastest tenth finished in 1:56:40 or better, the top quarter in 2:10:56, and half the field in 2:37:28; the last tenth came in after 3:48:25.
At the 2025 8K, the fastest tenth finished in 37:47 or better, the top quarter in 46:30, and half the field in 55:36; the last tenth came in after 1:22:02.
At the 2025 5K, the fastest tenth finished in 32:01 or better, the top quarter in 37:54, and half the field in 44:55; the last tenth came in after 1:01:37.
| Age | Women | Men |
|---|---|---|
| 20-29 | 2:06:07 | 1:51:23 |
| 30-39 | 2:04:13 | 1:46:16 |
| 40-49 | 2:24:28 | 1:56:15 |
| 50-59 | 2:30:33 | 2:28:35 |
Groups with fewer than five finishers are left out. Awards vary by race; check the race's rules.
Where a finish time would have placed in 2025.
Up 12 percent since 2022.
All events combined, from official results.
From 2022 to 2025, the field went from 141 to 155 finishers, and the median time rose from 2:32:13 to 2:37:28.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2025 | 155 (+9%) | 2:37:28 | under 1:56:40 | 1:21:57 |
| 2024 | 142 (+15%) | 2:27:09 | under 1:49:38 | 1:26:30 |
| 2023 | 124 (-12%) | 2:32:11 | under 2:01:09 | 1:41:01 |
| 2022 | 141 | 2:32:13 | under 1:50:50 | 1:28:36 |
From each year's official results for the Half Marathon; virtual options are left out.
Faster than most California trail half marathons
The fastest quarter of the 2025 half marathon field finished under 2:10:56, against 2:21:30 in a typical California trail half marathon, so times here run 7 percent faster.
Compares the fastest quarter of each field, so walkers and first-timers do not skew it. It reflects the course and the field together: a flat course, cool weather, or a competitive crowd all make times faster.
Around November 7 the day usually runs from 48°F at dawn to 65°F in the afternoon, with measurable rain on about 24% of days. Cold snaps dip to 40°F and hot years reach 74°F.
Based on 70 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
What the organizers of Lake Chabot Trail Run cover on their registration page, in brief.
Schedule and packet pickup
Race Day: Check-in beginning at 7:30 a.m. at the Lake Chabot Regional Park - Marina. Please arrive 45min before your event to receive your bib and shirt. Event start times are listed here. Parking is $5 per vehicle. Please bring exact…
Course
8K. Elevation Gain: 380'. Course Surface: Single Track (16%), Dirt Road (12%), Asphalt (72%). Half Marathon. Elevation Gain: 1,450'. Course Surface: Single Track (14%), Dirt Road (60%), Asphalt (26%). 30K. Elevation Gain: 1,830'. Course…
Course
8K. Zachary Chabot, 22, Manchester, NH ('15) 27:57. Kristen Chin,11, Palo Alto, CA ('24) 33:49. Half Marathon. Brian Johnson, 35, San Francisco, CA ('24) 1:26:29. Hania Thomas-Adams, 35, Alameda, CA ('24) 1:35:34. 30K. James Scanlan, 52…
Shirt and medal
To guarantee a shirt, please register 10 business days prior to the event.
Awards
T-shirts will be given to all pre-registered runners. All finishers will receive a custom medal and 50K finishers will also receive a custom coaster. Overall Winners: The top 3 male and female overall winners of every distance will win an…
Rules and FAQ
Entry fees to Coastal events are non-refundable. DEFER YOUR ENTRY. To defer an event that is scheduled as planned: Things happen or you change your mind. If you're just not able to make the event that you had planned on, here are your…
Organize this race? Add details or a correction
The course starts at the Marina and travels around the popular Lake Chabot reservoir and surrounding hills. Great course for first-time trail runners!
(Distances are accurately measured using a Rolatape® surveyor's measuring wheel.)