Bad Bass
About this race
Rising up from the depths of Lake Chabot, the Bad Bass (a strangely kilt-wearing, bagpipe-playing Scottish bass with teeth) shows itself once again on July 18th 2026! Why is he Scottish? What is he doing in Castro Valley? How can he play bagpipes with his fin? We have no idea how to answer those questions. Why is he so bad-to-the-fishbone? Maybe he just knows how awesome the trails of Lake Chabot really are!
Whatever the Bad Bass is doing here, we hope you'll join us at the beautiful Lake Chabot Marina in Castro Valley for the scenic Bad Bass 5K, 10K or Half Marathon!
Pick your distance
Running
HALF MARATHON
10K
5K
Remote Runner
Typical race-day weather
Based on 9 years of Open-Meteo archive data for this event's race dates in Castro Valley, plus the 3 days either side.
The sun rises at 6:01 AM and sets at 8:28 PM local time (PDT) in Castro Valley on July 18, 2026 — 14h 26m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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2026 results — Bad Bass
493 finishers across 4 distances · leading places in the HALF MARATHON
| Place | Name | Time | Pace |
|---|---|---|---|
| 1 | Kyle De Lauro | 1:32:11 | 6:59 /mi |
| 2 | Miguel Andrade-Salcedo | 1:37:59 | 7:25 /mi |
| 3 | Sam Williams-Baron | 1:43:46 | 7:52 /mi |
| 4 | Erin Gunther | 1:44:33 | 7:55 /mi |
| 5 | David DeGusta | 1:47:36 | 8:09 /mi |
Every finisher is on the results page, filterable by distance, gender and age group.
All results by year
Other races near Castro Valley
Different organizers, within 40 miles, in the next three months
Brazen New Year's Day
Brazen New Year's Eve
Lake Chabot Trail Run
Oakland Tech 5km/1 mile Race/Run/Walk Fundraiser
🏃 Plan Your Next Race in Castro Valley
Find upcoming events by distance:
- Castro Valley 5K Races 6 races
- 10K Run Events in Castro Valley 4 races
- Castro Valley Half Marathons 5 races
- Marathons in Castro Valley 2 races
- Castro Valley Running Calendar 2026 7 races
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 7 Castro Valley events
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