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Order our Wed Night Worlds Trail jersey here!

seattle mountain bike series jersey

Mountain Bike Racing

2017 MTB Race Schedule

“Almost” every Wed night beginning April 19th – Aug 16th 2017:

  • April 19, 26
  • May 3, 10, 17, 24, 31
  • June 7, 14, 21, 28 (Clif Bar BBQ)
  • July 5 (No Race)
  • July 12, 19, 26
  • Aug 2, 9, 16 (Awards Party)
  • Aug 23 (No Race)




Pre-Season Cross Racing

Aug 30, Sep 6 and 13 – Scroll for details

Day of

TREK Store Southcenter technical support crew is on hand each week. 

We sell $3 Pizza slices onsite. You must pre-order with us at registration no later than 6pm. 

Each week we run some kind of sponsor promo and swag give away. Listen up at staging, your name may be called!

Race Format

Wed Night Worlds is a Short-Track style cross country mountain bike race series in Seattle. Courses are a mix of fast single track, paved roads and grass. We change up the course flow and distance week to week keeping laps at about 2-2.5mls. Approximate laps times vary from 12-18min. A typical winning time would be: Kids Race – 15/20min. Cat 4 – 30min. Cat 3 – 45min. Cat 2 – 45min. Cat 1 – 60min.

5:30pm Race

Kids (6-10yr) – 2 short laps, about 20min

6pm Race

Cat 3 (Sport) – 3 laps
Cat 4 (Beginners) – 2 laps

7pm Race
Cat 1(Expert/Elite) – 4 laps 
Cat 2( Sport/Intermediate) – 3 laps 



Within each race there are Men’s and Women’s Adult and U15 Boys and Girls Junior categories (There is no Cat 1 Junior category). Each category competes for the series overall or best 15 of 17 races. Points go 40 deep. 


Online registration: Adult $17.50, U15 Juniors $9, U10 Kids $5

Walk-up registration: Adult $20, U15 Juniors $10, U10 Kids $5

All racers need a $5 Timing Chip. This is a one time cost, you own it. Most of you probably have one already if you race Cross around here. 

What does registration pay for?

Rider insurance, park user fees, RFID timing, online registration/results, website, race numbers, toilets, our wonderful staff and park clean up/maintenance.



Seattle Mountain Bike Racing Weekly Results

Seattle Mountain Bike Racing Series Results

Location - North SeaTac Park

13699 18th Ave S
SeaTac, WA 98168


Cyclocross Racing & Workouts

Marymoor CX at the Velodrome continues!

This is a Cyclocross Practice. There is no timed racing. We set up breakout coached skills classes as well as an open course. Join coaches Russell Stevenson, Loren Hanson, Jess Cutler, Matt Hill and Joe Martin. Want to do your own thing? The open course option is there for you. This is the only organized Cross Practice under lights around here. Come learn new tricks or push yourself in a mock-racing environment.
What: Cyclocross Workout under the lights at the Jerry Baker Memorial Velodrome 
When: 6:30-8:30 pm Wednesday, Sep 27Oct 4, 11,18  and Tuesday, Oct 24, 31, Nov 7, 14, 21
Where: Jerry Baker Memorial Velodrome (MAP)
* Parking is $1 paid at the park kiosk
6:30-8:30 – Open Course for anyone to ride.
6:30-7:15 – Breakout coached skills classes for Beginner, Intermediate and Advanced riders. Riders can self select their group.
7:15-7:30 – “Hot Lap” course preview (a slow group spin around the course)
7:30-8:30 – “Hot Laps” Mock-racing. Staggered start waves (Fastest to Slowest) on the track. No scoring, no lap board.
*Beginner and Intermediate skills classes continue until 8pm for those not interested in “Hot Laps”
Cost/Registration: Adult $12 – U15 Juniors $8
Pre-Register HERE or pay on site (cash, check or CC)
Questions please contact


Wed Night ‘Pre-Season’ Cross Racing 

Run on our N SeaTac course used the last two years, we’ll combine categories for one staggered start timed race. Bring your current Timing Tubes and Wed Night bib number. Don’t have either? We’ll have them available on site(timing chip $5). Finishing racers will have overall and lap times. We will change the course week to week, mixing in more passing areas and different run/barrier sections. Don’t want to race? We’ll also have Matt Hill’s skill clinic for hands on instructional basics: Mounting, Dismounting, Barrier Running, Uphill Runs and Bike Handling.

Day of Details:

PRE-REGISTRATION ONLY. We will limit registration to 100. There will be NO WALK UP REGISTRATION

Click here for results


Aug 30, Sep 6, Sep 13


A Group – 6:15pm (5 laps) 

B Group 6:20pm (4 laps)

Skills Clinic 6:00pm


Adult $20 – U15 Junior $10 – Skills Clinic $15 (all)


13699 18th Ave S, SeaTac, WA 98168 –  MAP – Parking on the grass area to the right as you come inside the gate. Please pack in tight and follow our attendants instructions.


It is imperative that we all exercise patients and respect to others while racing or riding. People of varying abilities will be on course, please respect one another and be respectfully vocal when passing or being passed.


We will offer our usual $3 pizza slices. You must pre order at Registration before 6pm. Pizza is reserved for pre-orders first and walk-ups second. 

Questions please contact us


News & Social Media

NW MTB Series
NW MTB Series3 weeks ago
Little nug here from our friends at Schooner Exact Brewing Co., congrats Joel!
NW MTB Series
NW MTB Series1 month ago
I case you missed it.... wed night cross at Marymoor is now Tuesday night.... for the final 5 weeks.

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