SHOWTIME: Saturday marks the 18th annual National Hunting and Fishing Day open house at Remington Farms near Chestertown, Md. The 3,300-acre private wildlife management area is open to the public from 10 a.m.-5 p.m., with a variety of wildlife-oriented exhibits and displays. Call (301) 778-1565 for information or directions.

Also, the Virginia Wildlife Federation sponsors its 19th annual Hunting and Fishing Day from 10-4 Saturday at the National Wildlife Federation's Laurel Ridge facility, four miles west of Tysons Corner on Route 7. Admission is free. Call (703) 536-4781 or (703) 360-4207.

The Deale (Md.) Volunteer Fire Department's fall sportsmen's show is next weekend, too, featuring guns, fishing gear, archery equipment and talks on fishing and hunting. Hours are 9-4 Saturday and 10-4 Sunday at the firehouse; admission $3 for adults, children free. Call (301) 867-3181.

WATERFALL: Autumn being prime time for river adventures, Washington's Canoe Cruisers Association offers three trips for novices this month and six more over the next couple of months.

Saturday, CCA groups head for Violettes Lock on the Potomac (call Gary Gordon, 301-926-8603) and to the Middle Youghiogheny in Pennsylvania (call John S. Thomson, 301-656-3630); on Sept. 29, Michael Hoon (301-589-7533) leads novice paddlers down the South Branch of the Potomac.

TAKE A HIKE: The outdoors equipment company REI in College Park is organizing a Capital Crescent Trail cleanup Sept. 29 on the woodsy path from Georgetown to Silver Spring. Volunteers meet at Fletcher's Boathouse at 8 a.m. Call (301) 982-9681 for information.

ROCKBUSTERS: Veteran Chesapeake Bay striped bass fisherman Keith Walters offers a new book on the tangled history of the Maryland state fish just in time for the reopening of striper fishing season Oct. 5. His 330-page paperback, "Chesapeake Stripers," covers the ups and downs of striper (rockfish) populations, the politics of management and offers some down-to-earth fishing tips. For a copy, send $22.50 to Aerie House. P.O. Box 279, Bozman, Md., 21612.

Meantime, Fishbusters Fishing Club of Fort Washington plans to charter boats for rockfish trips at Crisfield and Point Lookout, Md., Oct. 7 and 28 and is seeking anglers to fill available spots. Rates are $55 a person. Call (301) 292-8377.