Scenic Rivers Land Trust holds its annual Walk for the Woods at a wooded site formerly part of the Crownsville Hospital Center. Bird walk at 8 a.m., nature walk at 9 a.m. $25 fee includes T-shirt. Info.: www.srlt.org or 443-597-0063.

Maryland City Elementary School hosts a cleanup and flower planting at 9 a.m. Info.: 301-725-3535.

Earth Day Celebration at St. Martin's in the Field Church in Severna Park features activities, food, demonstrations and a 30-foot "Chessie" sculpture made of recycled materials, 10 a.m. to 2 p.m.

The City of Annapolis sponsors GreenScape 2008, an effort to spruce up and add plants to community spaces. The Annapolis Police Department will host a planting on its grounds from 8 to 10 a.m. Info.: 410-263-7993.

K&B True Value on Forest Drive in Annapolis gives away free tree saplings and offers 10 percent discounts on eco-friendly products. All day, continues through tomorrow.

Quiet Waters Park in Annapolis hosts its 17th annual Earth Day celebration, 10 a.m. to 4 p.m. Park entry is free all day. Info.: 410-222-1777.

The Sierra Club's Anne Arundel Group holds its annual Earth Day 5K at Quiet Waters Park. On-site registration starts at 7 a.m., with the race at 8:30 a.m. Fee is $23. Info.: 410-703-0847.

Dr. Dennis Whigham, an ecologist with the Smithsonian Environmental Research Center, leads a walk along the Little Patuxent River. Meet at 1 p.m. in the parking lot of Jasper's on Route 3 in Crofton. Info.: 301-261-3209.

Fort George G. Meade holds a family fair as a combined celebration of Earth Day, Month of the Military Child and Child Abuse Prevention Awareness Month, 10 a.m. to 2 p.m. at the Fort Meade Pavilion, near the Llewellyn Gate on Route 175. Info.: www.ftmeademwr.com or 301-677-1437.

All locations of Fitzgerald Auto Mall will give away free compact fluorescent light bulbs and display energy-efficient cars, 10 a.m. to 6 p.m.

Recycle old electronics (no TVs, light bulbs or alkaline batteries) at Annapolis City Dock, 10 a.m. to 2 p.m. Hard drive destruction is available for $10. Sponsored by WRNR radio and Turtle Wings. Info.: 703-960-0699 or www.turtlewings.com.

SUNDAY

St. Anne's Parish in downtown Annapolis hosts an Earth Day celebration after the 9:30 a.m. service. Info.: www.stannes-annapolis.org.

The Patuxent Research Refuge in Laurel marks Earth Day with a kids program at noon and a work party for weeding and trail maintenance at 1 p.m. Info.: patuxent.fws.gov or 301-497-5887.

MONDAY

School kids will participate in a planting at a stream restoration site near the Millersville Landfill called Aurora Hills, 9 a.m. to noon both Monday and Tuesday. County Executive John R. Leopold will lend a hand at 9 a.m. Monday.

TUESDAY

The City of Annapolis town clock at St. Anne's Parish will be switched to compact fluorescent light bulbs at 1 p.m.

Anne Arundel Medical Center hosts an Earth Day fair from 10 a.m. to 4 p.m., organized by the hospital's new AAMC EARTH Advisers Committee (Environmental Action Relates to Health).

In Odenton, Seven Oaks Elementary School students will plant a white oak donated for their new campus during a celebration at 10:15 a.m.

St. Andrew's United Methodist Day School, 4 Wallace Road, Edgewater, hosts a daylong Earth Day fair for students.