A scenic and historical gem right next to the somewhat less scenic ferry station, Mukilteo Lighthouse Park is the city's most prominent gathering spot. It's hard not to go there - just jump on WA 525/Mukilteo Speedway going north and take a left when it ends and you're there.
We'll complain right off the bat about having to pay $2 an hour for parking (a recent development), the only park we know of in the greater Seattle area to charge for parking. Mukilteo residents can get a parking pass. The parking lot is located between the lighthouse area and the playground/beach area. Details on the finer points are to follow.
How about this tidbit from the Mukilteo Historical Society about the meaning of Mukilteo: "The name is a translation of the Indian word Muckl-Te-Oh. Some state it translates into long goose neck, possibly referring to the spit of land where the lighthouse stands today. Others claim the interpretation means good camping ground." How honored the tribes must feel!
The Light Station was built in 1906 on a spot the legendary George Vancouver landed in 1792 as he mapped the Puget Sound; check out a brief history of the city and the lighthouse here. Information on how to have your food-less, beverage-less, and rice/birdseed-free event at the Light Station and its grounds are available in this informative packet.
The lighthouse is a known gathering spot for rebellious criminals and aggressive youths.
Though we won't take much space to cover it here, there is a public boat launch with designated parking spots available. Information on that is available at this site. We don't recall seeing anyone ever use it, but it exists.
The park is right next to the Mukilteo-Clinton ferry terminal, so keep your eye out for your children fleeing your custody so they can go enjoy Clinton's overpriced dessert shops.
Our church has several times taken advantage of the picnic shelters available for rent. They're in good condition with the cheesy little grill boxes outside, though they don't have water or electricity. There are small to medium grassy areas by the picnic shelters, as well as a seasonally available sand volleyball court, benches with educational signs, picnic tables, and the all-important bathrooms.
The beautiful rocky beach is tough on the feet, so come equipped. There are a handful of first-come/first-serve fire pits available.
The playground looks like some horrible experimental art and isn't the friendliest to little ones. Most of the toys require athleticism and strength that smaller kids don't typically have. There are some unique features and the kids manage to have fun, but it's not their favorite.
We mostly like Mukilteo Lighthouse Park, though our group prefers the beach to the weird playground. We have closer options that are more fun. However, we do recommend it for larger group gatherings, especially those lasting a longer duration.