Wonderland trail is my favorite of the area.
It's a bit early in the season, so many of the trails in Cascades/Baker/Rainier still have limited or no road accessibility due to snow. Lake serene is a good one and is open. Rattlesnake ridge and lake 22 are other popular options that are accessible.
If I try to sell my wife on Wonderland Trail I may at well stay at Rainier. Lol. She's a (rigorous) day hike kind of girl. But that looks like a hell of a boys trip!
There's some great day hiking in the lower elevations on the Peninsula but it's a bit of driving and you may not have the time.
There are many great trails around the Pacific NW. They range from wheel chair easy to very experienced only should attempt. This time of year the weather is frequently changing in short spans of time. A hike may start out in beautiful weather yet within an hour change to freezing rain and high winds. Be prepared to avoid hypothermia and other mishaps.
@Vansen Calling outdoorsman...
At this time of year in Seattle, you need to carry microspikes and a headlamp at all times. It’s still early, so you need to make sure you read up on trip reports before you go out. Trails are like spiderwebs up here and it’s easy to get lost, so map everything out well in advance.
Look for popular trails off of i-90 to the east of Seattle if you want to stay close to the city.
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