Event Series

Northwest Trail Runs hosts three trail run series: Winter Trail Series, Tuesday Night Trail to Grill, and the Half Marathon Trail Series. These series provide ongoing competition, as well as extra motivation and community.

No additional sign-up is required to participate in any of the series; simply complete any event in the series, and you will automatically be entered into the competition. Each series offers a swag prize for each person who participates in at least a specified number of events.

Half Marathon Trail Series
FEB - SEP

The Half Marathon Trail Series features several half marathon trail runs over the course of the year, designed to both whet and sate trail runners’ appetites for this wonderful distance!

The different events offer courses at a variety of venues, each with a unique beauty and challenge. Run three or more to earn a full series score. See how you compare to others in your age group, or challenge yourself to go the distance three times this year.

Use the red registration button below to register for multiple Half Marathon Trail Series events at once. Register for two races to get a 5% discount on your entry fees, three races to get a 10% discount, and four or more races to get a 15% entry fee discount!

Tuesday Night Trail to Grill
MAY - AUG

The Tuesday Night Trail to Grill series offers an opportunity to enjoy the long days of summer and get your trail fix on a weeknight. All runs practice extensive safety procedures, including staggered start times. Distances range from 4 kilometers to 10 miles. Come make the most of summer evenings, and put these fun runs on your calendar!

Use the red registration button below to register for multiple Tuesday Night Trail to Grill Series events at once. Register for two races to get a 5% discount on your entry fees, three races to get a 10% discount, and four or more races to get a 15% entry fee discount!

2022 Final Age-Group Standings (September 1 version)

2021 Final Age-Group Standings (August 20 version)

2020 Final Age-Group Standings (September 8 version)

2019 Final Age-Group Standings (September 14 version)

2018 Final Age-Group Standings (August 29 version)

2017 Final Age-Group Standings (as of August 26)

2016 Final Age-Group Standings, August 28 version

Thank you to Oiselle for supporting the Tuesday Night Trail to Grill Series. Oiselle not only helps promote the series, but also helps with their awesome volunteers! Bring in your bib number post race or proof of race registration and get 15% off any item at the Seattle Flagship store in University Village!

Athletic Brewing Co. is an official sponsor of the Tuesday Night Trail to Grill Series!

Amphipod is an official sponsor of the Tuesday Night Trail to Grill Series!

Winter Trail Series
NOV - FEB

The Winter Trail Series celebrates Seattle and the Eastside’s local parks with trail runs that will keep your winter fitness warm. All events have a choice of at least two distances, with shorter course lengths ranging from 4-8 kilometers (2.5-5 miles), and longer course lengths ranging from 10-21 kilometers (6-13 miles). So rally your running pals and put these motivating events on your calendar!

Event Series

Half Marathon Trail Series FEB - SEP

Tuesday Night Trail to Grill MAY - AUG

Winter Trail Series NOV - FEB

Half Marathon Trail Series
FEB - SEP

Tuesday Night Trail to Grill
MAY - AUG

Winter Trail Series
NOV - FEB