Spend a day giving back to the Colorado outdoors you love. Be a part of an ongoing volunteer effort to maintain the heavily-used trail to the Chicago Lakes, nestled in a stunning glacial cirque on the north side of Mount Evans. Volunteers for Outdoor Colorado continues the effort this year with a project to replace an old bridge that has seen better days. Learn more and register at www.voc.org/projects or call 303-715-1010. Free to participate; minimum age: 16.