THE WEATHER forecast for snow is promising, so Catoctin Mountain National Park will try again to hold its Winter Carnival on Sunday. A final decision will be made Friday.

If the Winter Carnival is snowed-on, it will have a 3.5-mile cross-country ski race, a dog sled demonstration, a snow sculpture contest, ski movies, horse-drawn sleigh rides, activities for children and refreshments. The carnival will be open between 10 and 4 Sunday. Before you go, call 301/663-9388.

Go to the Visitors Center on Route 77, three miles west of U.S. 15 in Thurmont, Maryland, and ask for directions to Camp Greentop, where the carnival will be held. Admission to the carnival is free. There is a $3 registration fee ($2 in advance) for the 2:30 p.m. cross-country race. The sleigh rides will cost $1.50 for everyone older than 5.

Snow sculptors can use small shovels or scrapers and decorate their creations with food colorings. The judging is at 2.

Here's a look at ski resorts within a six-hour drive of Washington: BIG BOULDER, 225 miles. LAKE HARMONY, PA. 717/722-0101.

Base of 33 to 40 inches, with a machine-made and granular surface. Eleven runs open and six lifts operating. Reciprocal lift tickets with Jack Frost Mountain, 6 miles away. Snow report: 717/722-0104. BLACKWATER NORDIC CENTER, 180 miles. DAVIS, W. VA. 304/259-5511.

Five kilometers of trails open. BRYCE MOUNTAIN, 120 miles. BASYE, VA. 703/856-2121.

Base of 10 to 40 inches, with a surface of machine-groomed powder. Four slopes open and four lifts operating. Invitational races at 9:30 a.m. Saturday and Sunday. Snow report: 703/856-2151. CAMELBACK, 230 miles. TANNERSVILLE, PA. 717/629-1661.

Base of 24 to 60 inches, with a surface of packed powder. Twenty-five trails open and 11 lifts operating. Ski education programs and ski products exhibit Saturday and Sunday. Snow report: 800/233-8100. ELK MOUNTAIN, 260 miles. UNIONDALE, PA. 717/679-2611.

Base of 14 to 36 inches, with a surface of packed powder. Thirteen runs open and four lifts operating. Snow report, 800/233-4131. JACK FROST MOUNTAIN, 225 miles. WHITE HAVEN, PA. 717/443-8425.

Base of 25 to 65 inches, with a machine-made surface. Nineteen slopes open and seven lifts operating. Reciprocal lift tickets with Big Boulder, 6 miles away. LAUREL MOUNTAIN, 190 miles. BOSWELL, PA. 412/238-6688.

Base of 2 to 24 inches, with a groomed surface. Five trails open and two lifts operating. Snow report: 412/238-4460. MASSANUTTEN, 125 miles. HARRISONBURG, VA. 703/289-9441.

Base of 25 to 70 inches, with surface of machine-worked packed powder. Six slopes open and three trails operating. MONTAGE, 210 miles. SCRANTON, PA. 717/969-7669.

Base of 14 to 36 inches, with a surface of machine-made packed powder and granular. Seventeen trails open and five lifts operating. NASTAR races Saturday and Sunday. SEVEN SPRINGS, 190 miles. CHAMPION, PA. 814/352-7777 or 800/458-2313.

Base of 8 to 36 inches, with a packed-powder surface. Twenty-eight runs open and 11 lifts operating. SKI LIBERTY, 65 miles FAIRFIELD, PA. 717/642-8282.

Base of 36 to 44 inches, with a surface of packed powder. Fourteen runs open and five lifts operating. Winter Magic Weekend offers games, snow volleyball, races and a skier safety contest on Saturday and Sunday. Snow report: 800/233-1134. SKI ROUNDTOP, 121 miles.

LEWISBERRY, PA. 717/432-9631.

Base of 50 to 60 inches, with a surface of packed powder. Twelve runs open and eight lifts operating. Snow report: 800/233-1134. SNOWSHOE, 245 miles. SLATYFORK, W.VA. 304/572-1000.

Base of 30 to 60 inches, with a surface of packed powder. Twenty-eight runs open and six lifts operating. A Couples Valentine's Race will be held at 11 Saturday. Snow report: 800/225-5982. WHITE GRASS TOURING CENTER, 188 miles. CANAAN VALLEY, W.VA. 304/866-4114.

Fifteen kilometers of trails open, with 3.5 kilometers machine groomed. Three downhill slopes open for telemark skiing. Night skiing this weekend. WINTERGREEN, 168 miles. WINTERGREEN, VA. 800/325-2200.

Base of 24 to 76 inches, with a groomed surface. Twelve runs open and five lifts operating. WISP RESORT, 185 miles. OAKLAND, Md. 301/387-5503.

Base of 6 to 24 inches, with a surface of packed powder. Eighteen slopes open and seven lifts operating.