Thank you to everyone that participated in the first-ever Diamond Dash 5K/1K!
To stay in the loop about the latest events at T-Mobile Park sign up to become a Mariners Insider.
We’re hosting the inaugural Diamond Dash 5K/1K fun run on Saturday, March 21 at T-Mobile Park! The race route will take fans through every level of the ballpark, ending on the warning track.
Registration includes a race bib and finisher medal.
- 5K Registration: $55.80
- 1K Registration: $41.60 (Kids ages 14 & under only)
Season Ticket Member registration does not include fees.
A portion of the proceeds will benefit the Mariners Care Foundation.
Each race participant must complete their own registration and waiver. Anyone under 18 years old must have a parent/guardian sign a waiver on their behalf.
For parent/guardian participation information, see our 1K event details >>
Please note:
- Registrants must be at least 15 years old to participate in the 5K without a parent or guardian. Kids ages 14 & under need to run the 5K with a supervising adult.
- Registration is non-refundable and non-transferable. No deferrals.
- All participants must be pre-registered. There will be no race day registration.
- There will be no gear check.
5K Fun Run Details
Timing and Awards
Racers will start in waves beginning at 10 a.m. Waves will continue every 10-15 minutes until all runners are on the course.
Each racer will be awarded a medal upon crossing the finish line.
Entertainment
Enjoy live music at the start, finish line and throughout the course. Plus, keep an eye out for Mariner Moose, the Salmon, Mariners Alumni and more!
Spectators
Spectators may view the finish line from a designated viewing area inside T-Mobile Park. Spectators will be required to have a free spectator ticket to enter the ballpark for the event (limit four per transaction). Kids ages 2 & under do not require a spectator ticket.
Only those registered for the race will be permitted on the warning track following the event.
Course Info
The 3.1 mile run will start outside of T-Mobile Park and continue inside the ballpark, ending on the warning track.
Water will be available at the halfway point and at the finish.
Restrooms will be available at the start/finish line and halfway point.
Emergency services and medical teams will be stationed throughout the course.
Headphones are discouraged, but if you do plan to use them, please keep the volume down so you can hear vehicle traffic and voice instruction.
No bicycles, hand cycles, inline skates, motorized devices, pets, skateboards or strollers permitted on the course.
Unregistered runners are prohibited from the course to assure runner safety and to comply with liability insurance requirements.
Please check back for an updated course map for 2026.
1K Fun Run Details
Fans 14 years of age or younger are eligible to run the 1K course, mirroring the route run by your favorite Salmon. This run will end at the finish line on the warning track.
Young participants should be accompanied by a parent/guardian. Parents/Guardians of registered participants will be required to have a free spectator ticket (limit four per order) and will receive a wristband allowing them access to the 1K course and finish line to cheer on their racers. Kids ages 2 & under do not require a spectator ticket. Only registered participates will receive a finisher medal.
5K & 1K Packet Pickup
Packet Pickup will be available for registered participants the week prior to the event. Details and information will be shared via email to the primary registrant.
THERE WILL BE NO GEAR CHECK ON RACE MORNING.
Contact Us
For questions or comments, send a note to Events@Mariners.com.