Most of the trails are melted out along the Mountain Loop Hwy plus it is a beautiful drive from Granite Falls to Darington or vice versa. Hikes range from 1 mile to 10 round trip with varying elevation gains depending on your goals. Some of the more popular ones are
Heather Lake, 4 miles RT
Lake 22, 5 miles RT
Monte Cristo town site (really cool) 8 miles RT on an old road. Easy hike/walk
North Fork Sauk River a flat easy hike through old growth
Mt Pilchuck 6 miles RT but still some snow
Goat Lake, 10 miles RT very nice lake, easy
Ice caves, 2 miles RT but no caves yet as of 2 weeks ago. Still a nice easy hike