WRC

The Rock the Loch 5K/10K/Half Marathon (LIVE or Virtual)

location_on

calendar_today 26 Jun, 2026 – 29 Jun, 2026

directions_run Running

language Official Website

sell $30 – $80

About the Event

We cannot promise you'll encounter any cryptic, aquatic creatures at Loch Chabot, but you might! We DO promise a gorgeous trail run on the scenic trails of Loch Chabot Regional Park, some quality nature therapy, and some incredible views!

We'll also hook you up with some awesome swag (an awesome shirt, a handcrafted race woodallion), a Rock the Loch beer sampler stein, & more), quality post run beverages/snacks, DJ Cryptid spinning your favorite tunes before/during/after the race, and more!

If you can't join us LIVE at Loch Chabot, no problem! We're supporting a VIRTUAL participation option as well.

Where: Lake Chabot in Castro Valley, CA.
When: Sun, 6/28- Early Half Start-8:15AM (for those needing 3.5-4 hours), Standard Half Start-9:15AM (for those needing 3 hours or less), 10K Start-9:30AM, 5K Start- 9:45AM.
Course Maps: 5K Course Map, 10K Course Map, Half Marathon Course Map.

Course Details:

Aid Stations:

The Experience:

All Rock the Loch participants receive....

Pre-Race Bib & Shirt Pickup: Sat, 6/27 from 12-4PM at Renew PT (460 Boulevard Way, Suite 2D) in Oakland.

*NOTE-A friend can pickup your bib/shirt for you provided they furnish proof of your registration and a copy of your ID/driver's license.

If you cannot claim your bib/shirt on Sat, 6/27, we will support race morning bib/shirt pickup from 7:30-9AM at the start/finish area.

PLEASE NOTE WE CANNOT SUPPORT REFUNDS, TRANSFERS, AND/OR CREDITS.

In the event of race cancellation due to wildfires, hazardous air quality, hazardous weather conditions, natural disasters, COVID and/or other global pandemics, or any 'act of God' that is beyond our control, we cannot support refunds, transfers, and/or credits. Please note this has only happened ONCE due to COVID in 2020, but anything is possible. Please make sure you are comfortable with these potential risks before you sign up. 

In the event of race cancellation due to any of the aforementioned, we will ship all race swag/items to participants and provide direction around navigating the course(s) on your own. We'll also provide direction around submitting your result. 

We also cannot support refunds, transfers, and/or race credits if you get injured in the days/week(s) leading up to race day, if your schedule changes in the days/week(s) leading up to race day, if a work trip comes up that makes it impossible for you to attend on race day, and/or any other professional or personal matter that arises making it difficult for you to attend in person on race day.

In the event of any of the aforementioned, we will ship all race swag/items to said participants and provide direction around navigating the course(s) on your own. We'll also provide direction around submitting your result.

Races Offered

The Rock the Loch 10K (VIRTUAL)

Jun 26, 2026

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Distance — 10K

terrain

Type — Trail running

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00:01

sell

$40.00

The Rock the Loch 5K (VIRTUAL)

Jun 26, 2026

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Distance — 13.1 Miles

terrain

Type — Trail running

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00:01

sell

$30.00

The Rock the Loch Half Marathon (VIRTUAL)

Jun 26, 2026

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Distance — 5K

terrain

Type — Trail running

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00:01

sell

$50.00

The Rock the Loch Half Marathon (LIVE)

Jun 28, 2026

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Distance — 5K

terrain

Type — Trail running

timer

09:15

sell

$80.00

The Rock the Loch 10K (LIVE)

Jun 28, 2026

straighten

Distance — 10K

terrain

Type — Trail running

timer

09:30

sell

$55.00

The Rock the Loch 5K (LIVE)

Jun 28, 2026

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Distance — 13.1 Miles

terrain

Type — Trail running

timer

09:45

sell

$40.00

Weather Overview

These values represent the 3-year monthly averages for June in Castro Valley.

Temp (°C)
Feels Like (°C)
thermostat 11.8° / 20.6°
wb_sunny 10.1° / 17.7°
Wind (km/h)
Humidity (%)
air 12.1 /
water_drop 75.1%

About Castro Valley

Scenic view of

Castro Valley is an unincorporated town in the inner East Bay in the Bay Area of California. It has a population of about 60,000 and is located north of Hayward and east of San Leandro and south of the Oakland hills. Since it is unincorporated, Castro Valley is governed by the County of Alameda, which has its county seat in Oakland.

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Hotels & Places to Stay

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