Reached the main parking area at Shoreline Park just before 2pm. The roads were mostly clear, some ice and slush in the parking lot.
Hiked a clockwise loop down to Hidden Lake, up Boeing Creek, and back to the parking lot. Compact snow on the trail; microspikes were useful on a few of the steeper sections. Part of the trail along Boeing Creek was washed out, but the water was just low enough that we could hop up along the stream rather than climb around.
There were a lot of families out sledding in the sports area, but only a few people on the trails (incl one party on skis)...