Katharine R. Toerge, 81, who raised horses and belonged to a number of Virginia hunt clubs, died Tuesday at her home in The Plains, Va. She had suffered from a heart ailment.

Mrs. Toerge bred thoroughbreds for show jumping, steeplechasing and hunting at her Little Cotland Farm stables.

A member of the Orange and Middleburg hunts, she had been a master of the Piedmont Hunt.

Horses owned by Mrs. Toerge had won a number of steeplechase and point-to-point races. She herself had ridden winners in races in Long Island, New Jersey and Virginia.

Mrs. Toerge was a native of Ardmore, Pa., and a graduate of Miss Porter's School in Farmington, Conn.

She had lived in New York and been a member of the Meadowbrook Hunt in Long Island before moving to Virginia in 1946. She also had been a member of the Aiken Hunt in South Carolina.

Her first husband, Geraldyn L. Redmond, died in 1930. Her second marriage, to Norman K. Toerge, ended in divorce.

She is survived by a son, Geraldyn L. Redmond, of Glen Cove, N.Y.; a daughter, Nancy McVitty of The Plains, and six grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Society for the Prevention of Cruelty to Animals.