Oakton's Lantz Balthazar didn't think he was strong enough to play football so, last spring, as a junior at Rocky Mountain High in Colorado, he tried out for the track team. The Cougars are happy he did.

Balthazar piled up 20 of Oakton's first 36 points yesterday with first places in the high jump (six feet) and the long jump (21-4), pacing his team to the Potomac District championship at Marshall.

The efforts of the 6-foot-1, 155-pound senior transfer as well as Chris Benjamin's pole-vault victory (13-3), helped Oakton accumulate 125 points without winning a running event. Fairfax, which scored heavily on the track, finished second with 108 and Falls Church was third with 91.

"I chose the long jump and the high jump because I wanted to build up my legs for football," said Balthazar, who also picked up a fourth place in the 100 (10.6). At the Fairfax championships two weeks ago, Balthazar long-jumped a personal-best 22 1/2 for first place; he has high-jumped 6-6 in practice.

The two-mile featured Oakton's Jimmy Hill, whose time of 9:19.0 this season ranks him first in the metropolitan area. But Mark Donohue of Fairfax stayed on Hill's heels today for seven laps of the race on a sloppy track and surged past him on the straightaway for a 9:33.0 victory.

Fairfax's Lee, Dillard won the 120-yard high hurdles (15.0) and the 330 intermediate hurdles (41.4, anchored his 880-relay team to a 1:34.0 win and was second in the triple jump, third in the long jump.