Reggie Henderson of Washington, D.C., a junior at George Mason, led the Patriots to a second-place tie in the IC4A indoor track championships yesterday at Princeton's Jadwin Gymnasium.

Henderson set a meet mark in the 500-meter run and ran second leg on the winning mile relay team. Those two victories accounted for 20 of George Mason's 50 points. Rutgers had 50 but Villanova got 92.

Henderson, a transfer student running in his first IC4A meet, easily won his section of the 500-meter run in 1:1.91 to break the 1:2.10 mark of Derrick Teynado of Seton Hall set at last year's meet.

The Patriots' team of Henderson, Tommy Lovelace, Ronnie George and John Parker, who ran the mile relay in 3:14.19, will take the nation's second fastest time into the NCAA indoor meet next weekend in Detroit. All indoor records are unofficial.

Nick Saunders of Boston University beat Navy's Leo Williams (7 feet 4 1/4 inch) and broke the meet high jump mark of 7-4 1/2 inches, held by Williams. Saunders' 7-6 1/2 was the best indoor jump ever in NCAA competition. But he missed three times at 7-9, trying to set a world indoor best.

Maryland's William Butler won the pole vault with 16 feet 3 3/4 inches. Maryland finished sixth overall with 32 points . . .

Joe Showers of Arlington won the 600-yard dash in 1:16 in the 30-34 age group of the Philadelphia Masters Indoor Track championships in Chester, Pa.. Al Walton of Washington won the 60-yard dash in 6.4 and the 300-yard dash in 34 seconds in the same age group . . .

Tamara Bykova of the Soviet Union became the first woman to high jump 6-8 when she won at the European Indoor Track and Field Championships in Budapest.

The old indoor best was 6-6 3/4 by Colleen Rienstra of the United States at Ottawa last year.

In the men's meet, Thomas Munkelt of East Germany won the 60-meter hurdles in an indoor mark 7.48 seconds. Munkelt, the Olympic 110-meter hurdles champion, beat the mark of 7.54 held by Soviet sprinters Andrej Prokojev and Jurij Cservanyev.