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Mossyrock Independence Day 5K & 8K


Saturday, July 4, 2026, 8:30 a.m. start

Participants choose between a 5K and 8K Hill Challenge.
Some will run, some will walk—all will be dazzled by the scenery.

The amazing route winds through the trails on Tacoma Power property near Mossyrock Park and includes the rare opportunity to cross the Mossyrock Dam and take in the awesome Riffe Lake views!

    1. We will be walking across the dam and then starting on the far side and running back across.
    2. The 8K run will include a hill challenge. If you accept the challenge, you will be running/walking to the bottom of the dam and then back up before completing the course.
    3. Both the 5K and the 8K will have a small cross county component. (See both maps below)

Adults—$32.50

Children, 12-17—$25

Children 11 and under—free

Register Today!

Special pricing available for families.

Register 2 adults and 1 youth OR 1 Adult and 2 Youth.

You may enter any other youths for free. (They will not receive a free T-shirt, but you can purchase them separately.) In order to do this, just enter them as age 11 and younger and you will not be charged. Then please email us their names and ages so we can adjust the information on the back end. emeelhuysen@myarborhealth.org

Refund Policy: Partial refunds (75%) are available until June 13. We are unable to provide refunds after June 13.

Please note: Dogs and bicycles are not allowed on the course. (Service dogs are excluded from this rule.) Stroller are fine on both races, but large-wheel varieties are recommended as there are gravel sections and a small section that runs on grass.

PLEASE NOTE, ONLY REGISTERED PARTICIPANTS ARE ALLOWED ON THE DAM. And ONLY DURING THEIR RUN/WALK. DO NOT GO BACK ONTO THE DAM.

Directions to parking area

  1. From Mossyrock—Continue on Mossyrock Rd toward Mossyrock Park, which will automatically turn into Ajlune Rd.
  2. You will turn left onto Young Rd., prior to reaching the park.
  3. Follow Young Rd around - turn right onto Hydrovista Lane. You are now entering the event site.
  4. Turn right onto Switchyard Lane and you will be parking along this road.
  5. The highlighted area near the start line shows the parking area. Please park angled in.

Sponsors Needed

Sponsors make our world go round!

A Mossyrock Area Action League event, in partnership with Arbor Health.

A special thank you to the 2026 sponsors!