This year, Burlington’s Intervale Center hosts its beloved annual Summervale fest in one walloping day. Family-friendly activities, live tunes and good eats set the jubilant tone, while reps from local orgs such as the Winooski Valley Park District, the Lake Champlain Basin Program and City Market offer up information-packed chats. Community-minded guests plant trees to help restore the center’s riparian forest, then lace up their trail shoes and take in scenic vistas in a meandering 5K group run. Would you rather fly solo? A one-mile, self-guided walking loop highlights the area’s native flora and fauna — as well as the center’s vital work in stewarding the land.