Point-to-point steepchasing has another full weekend of action with racing at Berryville, Va., and Unity, Md., on Sunday.

The George P. Greenhalgh Memorial, third leg in the spring-long battle for the Seven Corners Challenge Trophy, will share the spotlight with the Woodley Challenge Trophy race on the Blue Ridge Hunt's seven-race card at Berryville. The hunter pairs race opens the program at 11 a.m.

The Greenhalfgh, at three miles over timber, and the Woodley, at two miles over hurdles, are owner-rider events and important cogs for Virginia championships. The Sandy Baldwin Memorial, the ladies race, the open timber race and the open hurdles race round out the program.

The Montgomery, an open timber race at three miles, is race No. 2 for Maryland's Gevernor's Cup, emblematic of that states spring point-to-point meeting at Tusculum Farm at Unity.

Virginia's Seven Corners competition has received a setback with the announcement that veteran David Semmes of Potomac has taken his At The Spa and Super Sub out of competition for the year.

Semmes has been one of the standbys in the competition since his first appearance with the redoubtable August Acorn in 1967. Over the period 1967-1976, with time lost for various injuries, the now 16-year-old dark brown gelding by Spartan Valor-Ma Ginny, has been in the money more than any other Seven Corners jumper.

He has won three Ben Venue Cups at Rappahannock, two Potomac Cups at Potomac, the Times Mirror Cup at Oatlands and others. In 1975 he almost won Virginia horse of the year honors for his feat of placing in all seven of the races he ran. Last year he was in the money in five of six races, remarkable for a 15-year-old with "troubles."