PORTLAND — The Maine chapter of the Sierra Club environmental group will host a series of outdoor events to celebrate the 50th anniversary of the federal Wilderness Act.

The events include hiking, camping and canoeing trips in Maine’s wild areas. The events begin May 31 with a trip to Sears Island and end with a writing workshop at Lunksoos Camp in Stacyville from Oct. 3-5. Other events include a yoga retreat at Camp Mechuwana in Winthrop from Aug. 22-24 and a celebration of the 100 Mile Wilderness at West Branch Pond Camps in Greenville from Aug. 8-10.

President Lyndon Johnson signed the Wilderness Act in 1964. It established the National Wilderness Preservation System.

The complete list of events is available online.