Through Sept. 26: Chesapeake Changes, a natural history exhibit that focuses on the geology, geography, wildlife and human settlement in the 64,000-square-mile watershed of the bay, Explorers Hall of the National Geographic Society, 17th and streets NW, Washington, D.C.
Today: Last day of Gun and Knife show sponsored by the Camrod Hunting Club, Agriculture Center, Westminster, 9 a.m. 250 trade tables. Admission is $4, with children under 12 admitted free when accompanied by an adult.
Sept. 25-26: 28th annual Governor's Invitational Firelock Match at Fort Frederick State Park in Washington County. Team and individual competition with musket, pistol, drilling, artillery and tomahawk. Period cooking and dress. Admission is free. For more information, call (301) 842-2155.
Sept. 25: Hunting and fishing expo sponsored by Post No. 60 Sportsman's Club, American Legion Post 60, Main Street Laurel, 9 a.m. Guest speakers, turkey shoot, hunting fishing and camping equipment for sale. Admission $3, children under 10 free.
Tomorrow: Monthly meeting of Pasadena Sportfishing Club, Orchard Beach Firehall on Solley Road, 7 p.m. Speaker will be Roy Jinkers from Woods and Waters magazine on best local baits. The public is welcome.
Sept. 19: Maryland B.A.S.S. Federation Junior team championship on the upper Potomac River.
Sept. 26: Bass Bonanza 93, open fishing tournament on Loch Raven Reservoir, sponsored by Liberty Bassmasters, 7 a.m. to 4 p.m.. Cash prizes and entry fee.
fTC Friday: Maryland Pro Sports Chapter of Ducks Unlimited annual dinner auction at the Camden Club, 5 p.m. Stadium tour, dinner and live auction.
Saturday: Muzzleloader class sponsored by the Department of Natural Resource at Howard County Fairgrounds, 8 a.m., fee and preregistration required. For more information, call (410) 461-3007.
Sept. 19: International Bowhunter Education Course, Baltimore Bowmen Archery Club, 8 a.m. Preregistration required. For more information, call (410) 254-9588.
Tomorrow: U.S. Coast Guard Auxiliary Sailing and Seamanship course offered by Flotilla 11 at the Marco Club in Middle River, 7-9 p.m. two nights a week for seven weeks. For more information, call (410) 574-5095 or (410) 363-0925.
Tuesday: Registration for basic boating class taught by Patapsco River Power Squadron, Old Mill High School, 600 Old Mill Road, Glen Burnie, 7 p.m. The course will run 10 weeks.
Wednesday: Registration for safe boating and coastal navigation courses offered by the Pasadena Flotilla of the U.S. Coast Guard Auxiliary, Pikesville Senior High School, 7621 Labyrinth Road, 7:30 p.m. The course runs 10 consecutive Monday nights beginning Sept. 20. For more information, call (410) 358-8205.
Sept. 20: U.S. Coast Guard Auxiliary Sailing and Seamanship course offered by Flotilla 11 at Oakwood Elementary School in Glen Burnie, 7-9 p.m. two nights a week for seven weeks. For more information, call (410) 363-0925 days or (410) 363-2827 evenings.
Wednesday: Mountain Club of Maryland hike in the Loch Raven watershed. For more information, call (410) 329-3541.
Saturday: MCM Appalachian Trail maintenance trip focusing on trail erosion, parking lot construction and switchback repair.
Note: To have an item included in the Outdoors Journal, write Outdoors Editor, The Baltimore Sun, 501 N. Calvert St., Baltimore, Md. 21278-0001.