NASHVILLE, Tenn. (AP) — The Tennessee State Parks are celebrating National Public Lands Day with a variety of volunteer projects and hikes.

According to a news release, planned service projects include clean-ups, trail maintenance and removing invasive species. Some of the activities qualify for the community service requirement in the Tennessee Promise program.

National Public Lands Day is always the fourth Saturday in September. This year it falls on Sept. 28.

Projects will include trail construction at Cumberland Trail State Park; water quality testing at Warriors’ Path State Park; a hike at Bicentennial Capitol Mall State Park; a bike trail groundbreaking at Edgar Evins State Park; playground upgrades at Mousetail Landing State Park; and trail clean-up at Meeman-Shelby Forest State Park.

complete list of projects is available at the state parks’ website.