Big River Adventure

Sat, May 30, 2026, 8:15 AM PDT

Location: Mendocino, CA; Big River State Park, Big River Beach Boat Launch, 95460
Type: RUN

Official registration

At a glance

Choose your adventure: run, swim, walk, or paddle through scenic Mendocino, all while supporting cancer services.

Fun
Scenic
Quirky
For a Cause

Great for: cause-driven runners

The 26th annual Big River Adventure invites you to experience Mendocino's scenic beauty while supporting a vital cause. This unique event allows you to choose your journey, whether you prefer to run, swim, walk, or paddle along the Big River. It's a family-friendly opportunity to connect with the community, honor those impacted by cancer, and raise funds for free services in Mendocino County. Join this meaningful adventure and make a difference.

What to expect

Embark on a unique journey where you can run, swim, walk, or paddle through the stunning Big River scenery.
Join a family-friendly event dedicated to honoring those impacted by cancer and raising vital funds.
Experience the beauty of Mendocino County with a shared goal of making a difference.

Standout details

Choose your adventure: run, swim, walk, paddle
Supports Cancer Resource Centers
Family-friendly event
Stunning Big River views

Auto-drafted from the public listing — confirm details on the official event page before signing up.

Distances & registration

6 options

Registration for all distances is through the official signup link above.

Kiddie Race
Sat, May 30, 8:15 AM PDT · From $11.60
Opens Nov 15, 2025, 7:00 PM PST · Closes May 29, 2026, 5:30 AM PDT
5K Run
Sat, May 30, 8:30 AM PDT · From $38.10
Opens Nov 15, 2025, 7:00 PM PST · Closes May 29, 2026, 6:15 AM PDT
10K Run
Sat, May 30, 8:30 AM PDT · From $38.10
Opens Nov 15, 2025, 7:00 PM PST · Closes May 29, 2026, 6:15 AM PDT

+ 3 more options

Big River Swim
Sat, May 30, 8:30 AM PDT · From $38.10
Opens Nov 15, 2025, 7:00 PM PST · Closes May 29, 2026, 6:15 AM PDT
Big River Paddle
Sat, May 30, 8:30 AM PDT · From $38.10
Opens Nov 15, 2025, 7:00 PM PST · Closes May 29, 2026, 6:15 AM PDT
5K Fun Walk
Sat, May 30, 8:45 AM PDT · From $38.10
Opens Nov 15, 2025, 7:00 PM PST · Closes May 29, 2026, 6:30 AM PDT

The course

From the organizer

Welcome to the 26th annual Big River Adventure!

Join us for a unique race experience where you can choose your adventure to run, swim, walk, or paddle your way through the scenic beauty of Mendocino County's Big River.

For the past 26 years, Cancer Resource Centers of Mendocino County has been bringing our community together for this special fundraising event. While the activities may change from year to year, our mission remains steadfast: to honor and remember those impacted by cancer, and to raise vital funds to support free services for individuals facing cancer in Mendocino County.

Starting at the Big River boat launch, participants will embark on a journey filled with stunning views and the shared goal of making a difference in the lives of others.

Don't miss out on this unforgettable adventure! Register now and be part of something truly meaningful.

To keep this family-friendly event affordable and accessible to our community, we will not be providing t-shirts this year.

Here is a link to a trail map

• 5k runners will run east on the haul road to the 5k turn around.

• 10k runners dash east on the haul road to the 10K turn around (10K map).

• 5k "Fun" Walkers will follow the 5k runners route.

• Kiddie run will begin at the boat launch

• Swimmers will dive in at the boat lunch and swim east up Big River

• Paddlers will begin at the boat launch and paddle east up Big River *Please note you must bring your own vessel.

There are multiple race age divisions. Note: Participants between the ages of 6 and 17 may enter any race division at a discounted rate of $20 at signup.

Race Contact Info

Phone / Teléfono: (707) 937-3833

E-mail / Correo electrónico: info@crcmendocino.org

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