WHITEWATER: Canoe Cruisers Association holds its annual picnic Saturday at 3:30 p.m. at Carderock Picnic Area near Glen Echo. Members and nonmembers are welcome; bring your own food, grills available; $5 donation requested. Also, this is the last week to try CCA's summer introduction to paddling program. Last sessions are at 6:30 p.m. Tuesday at Fletcher's Boathouse in the District and the same time Thursday at Swains Lock in Potomac. No reservations needed, boats available; $2 donation requested.

PENGUINS: Photographer Ron Naveen, founder of the Antarctic Penguin Survey, presents a slide show at the annual meeting of the Audubon Naturalist Society at 8:30 p.m. Thursday at Woodend, the organization's 40-acre nature preserve at 8940 Jones Mill Rd., Chevy Chase. Talk is preceded by potluck dinner from 6 to 7:30 and election of board members from 7:30 to 8:30. Newcomers welcome; call 301-652-9188, ext. 10.

CIRCUIT TRIP: Annapolis Rowing Club holds its annual Wye Island Regatta at 8:30 a.m. Saturday. Competitors circumnavigate the Eastern Shore island in all sorts of people-powered craft. Trip is 12.4 miles over sheltered water. Picnic follows. Registration required, call Rod Beach, 410-269-0985.

HANG ON: InnerQuest and REI, the outdoors store in Baileys Crossroads, have a three-day basic rock-climbing class at REI starting next week that covers top-roped climbing, anchors, harnesses, knots, spotting, belaying and climbing techniques. Classes are Sept. 15, 22 and 29; cost is $65. Call 703-379-9400.

TROLLING TALK: Capt. Rich Novotny is featured speaker at the monthly meeting of Maryland Saltwater Sportfisherman's Association at 7:30 p.m. Wednesday at VFW Post 304 on Chinquapin Round Road, Annapolis. Call 410-349-0400.