The pedestrian and bicycling-only curves of E Interlaken Blvd will be filled with thousands of runners, rollers, joggers, and don’t give up you can do it walkers as the Seattle Marathon passes across the north slope of Capitol Hill Sunday morning.

The Seattle Department of Transportation says there will be trail and street closures across the route including SR-99, the Burke-Gilman, and I-5 Express lanes. Streets should reopen by 2:30 PM. Be prepared for delays along 24th Ave E where the route crosses the artery.

The full marathon’s official start time is 7 AM. Many participants won’t arrive in Interlaken until noon.

Around 15,000 participants are expected across the day’s events including the half and full marathon. In 2023, there were more than 1.700 runners and walkers who finished. Times ranged up to 18 minutes per mile for the slowest having the most fun-est runners.

In 2019, marathon organizers re-routed the course away from Interlaken as part of moves needed to avoid light rail construction on the I-90 bridge and flatten the course. After the pandemic forced the cancellation of the 2020 race, organizers finally restored the Interlaken portion of the run for the race’s 2022 edition.

Crowds gather on the northern fringes of Capitol Hill to mark mile 22.5 of the race with an annual final boost of cheering and enthusiasm.

More information on the race is at seattlemarathon.org.

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