GREENWOOD PARK WORK PARTY, to weed, groom and mulch landscape beds, on Saturday, April 19, 10 a.m.-noon. Meet at north pergola, Evanston Ave. N. and N. 87th St. Beth Pflug, 684-4096NORTHACRES OFF-LEASH DOG AREA WORK PARTY, to repair outer trails and split rail fence and general cleanup, on Saturday, April 19, 10 a.m.-1:30 p.m. Northacres Park, 12718 First Ave. N.E. Pam Masse, 683-0777.MAGNUSON PARK WORK PARTY, on Saturday, April 19, 10 a.m.-2 p.m. North Forest Remnant, N.E. 65th St. and Sportsfield Drive. Bonnie Miller, 524-8713.MAGNUSON PARK NORTH SHORE NATIVE-PLANT RESTORATION, on Tuesday, April 22 and April 26, 9 a.m.-1 p.m. Sharon Blevins, 233-7875.THORNTON CREEK ALLIANCE WORK PARTY, to remove invasive plants and pick up trash, on April 26, 9 a.m.-1 p.m. Meet at Willow Creek. Cheryl Klinker, 367-4635.GREEN MY RIDE ALTERNATIVE-TRANSPORTATION FAIR, with bike swap, children's activities, music and more, on April 26, 9:30 a.m.-3:30 p.m. Free. Phinney Neighborhood Center, 6532 Phinney Ave. N. www.greenmyride.info.BITTER LAKE SOUTH SHORELINE WORK PARTY, to remove invasive plants and maintain native aquatic habitat, sponsored by Bitter Lake United Friends and Neighbors, on April 26, 10 a.m.-noon. Bitter Lake Community Center, 13035 Linden Ave. N. Will Murray, 684-7524.BITTER LAKE SPRING CLEAN COMMUNITY CLEANUP, to pick up trash and mark storm drains, on April 26, 10 a.m.-noon. Bitter Lake Community Center, 13035 Linden Ave. N. Robert Herzog, 684-7524.BURKE-GILMAN TRAIL AT SAND POINT PARK WORK PARTY, to plant nodding onion and dicentra and remove invasive plants, on April 26, 1:30-3 p.m. Burke-Gilman Trail, N.E. 60th St. entrance. Bonnie Miller, 524-8713.MAGNUSON PARK PROMONTORY PARK HABITAT ENHANCEMENT, on April 28, 9 a.m.-noon. Meet at Education Pavilion, near boat-launch parking lot. Bonnie Miller, 524-8713.[[In-content Ad]]