Join with friends, family and fellow outdoors enthusiasts in a fun event that supports King County Parks — the Big Backyard 5K presented by Group Health on May 31 at Marymoor Park.

The Big Backyard 5K starts at 9 a.m. and takes participants through Marymoor Park at the northern end of Lake Sammamish. The course follows the Marymoor Connector Trail and a portion of the East Lake Sammamish Trail. Strollers and leashed dogs are welcome.

A free kids’ dash featuring King County’s environmental mascot Bert the Salmon follows the fun run at 10 a.m., and then it’s time for the awards ceremony at 10:15 a.m.

Included in the $40 registration fee is an event T-shirt, plus food, drinks and more on race day. Sign up online at www.bby5k.com. Funds raised by the 5K help leverage King County taxpayers’ investment in parks, trails and open space by keeping these features open and safe for all to enjoy.

The Big Backyard 5K promotes fitness and community involvement, and has raised more than $200,000 for King County Parks.