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PORTLAND, Ore. – It's known as the mother of all relays.

The 33rd annual Hood to Coast Relay began early Friday morning at Timberline Lodge on Mount Hood. Runners wound through Portland Friday and triumphantly ran into the Seaside finish line Saturday.

Hood to Coast wraps in Seaside

More than 1,000 teams participated in the 199-mile relay, which bills itself as the largest running relay in the world.

Each team includes 8-12 runners, each running three legs of around six miles each through mountain passes, city streets and coastal roads while shuttle vans get their teammates to hand-off spots.

The first Hood to Coast featured just eight teams back in 1982.

Read more: After triple bypass, man prepares to run Hood to Coast

This year's Hood to Coast includes 12,600 runners and 3,600 volunteers.

The event also includes the PDX to Coast Walk Relay and PDX to Coast High School Challenge. Both relays start Friday at the Eastbank Festival Plaza near the Hawthorne Bridge.

Course maps

The walk relay is the largest of its kind in the world, according to the event's website. More than 400 teams participated in the 132-mile walk.

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The High School Challenge is the largest high school relay in the world. It features 50 teams of high school students.

The race generates more than just a sense of accomplishment - it also raises money for a good cause.

In the last six years, Hood to Coast has donated around $5 million for cancer research.

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