Larry McKillip of Saranac Lake, N.Y. guided his two-man bobsled four times down the mile Mount Van Hoevenberg Olympic run in Lake Placid, in the total time of 4 minutes 57.81 seconds to win Stevens Memorial Trophy in the Adirondack AAU meet.

George Downing, 31-year-old surfer from Honolulu, mastered waves from 12 to 15 feet high to win the senior men's championship in the Makaha International Surfing competition at Makaha Beach on the island of Oahu in Hawaii. Downing also won the event in 1954.

Gail Purdy, 19, Paul Smith's College student from Glens Falls, N.Y., 1961 New York women's amateur golf champion, swept all events to win the senior women's speed skating title in the Lake George (N.Y.) International Silver Skates. She is a strong 1964 Olympic prospect.

Larry Wicks, 18, of Naples, Fla. battled a stingray without any help for seven hours on a 105-pound test nylon line before landing it. The stingray was measured at 14 feet 4 inches and weighed 506 pounds. The fisherman is 5 feet 3 and weighs a mere 100 pounds.

Bill Mahoney of Phoenix, Ariz., captain of the Notre Dame track team in 1938 and its coach in 1940 and 1941, now an attorney, was elected president of the Notre Dame alumni association. Mahoney is credited with helping develop famed Irish two-miler Greg Rice.

Ron Warner, Gettysburg College senior from York, Pa., a 5-foot 10-inch basketball player who is his team's leading rebounder and has scored nearly 1,600 points, set a Gettysburg record by making 22 free throws in 22 tries against St. Joseph's. His team still lost 80-79.