Yuletide fare is more festive than ever at the following Maryland establishments, which are featuring special holiday buffets or menus. Restaurant specialties and price ranges are noted:

AE (American Express), DC (Diners Club), CB (Carte Blanche), MC (MasterCard), V (Visa), C (Choice); "Free parking" indicates the establishment has a parking lot. "Full bar" indicates the restaurant is licensed to serve spirits, wine and beer. "Reservations" indicates that they are required.

Bethesda Marriott, 5151 Pooks Hill Rd., The Kona Kai Restaurant, Bethesda. Tel.: 897-9400. Christmas Day buffet from noon to 6 p.m. Cards: AE, DC, CB, MC, V, C. Free parking. Full bar. Prix fixe is $16.95 per adult, which includes unlimited champagne, and $8.95 per child under 12 and free for children under 3. Reservations. Holiday menu includes carved goose, steamship round, baked ham, a seafood bar of clams, oysters and shrimp, an assortment of vegetables, a salad bar, bagels and lox, and fresh fruit, petit fours, cakes and pastries.

Chevy Chase Holiday Inn, Mayfair Restaurant and Lounge, 5520 Wisconsin Ave., Chevy Chase. Tel.: 986-1600 or 656-1500.Christmas Day a la carte dinner from 11:30 a.m. to 8 p.m. Cards: AE, DC, MC, V. Free parking. Full bar. Entree price range is $12.50 to $14.75, half-price for children. Reservations. Special menu: soup and salad, roast turkey with stuffing and cranberry sauce, baked ham with pineapple or raisin sauce, prime rib of beef au jus, grilled salmon with hollandaise sauce and rock cornish game hen with wild rice. Vegetables: minted peas and pearl onions, acorn squash, candied sweet potatoes or whipped potatoes. Desserts: pecan pie, Christmas log (pastry roll with filling) or pumpkin pie.

Gaithersburg Marriott, (Hazelton's Restaurant) 620 Lakeforest Blvd., Gaithersburg. Tel.: 977-8900, ext. 6670. Christmas buffet from noon to 8 p.m. Cards: AE, DC, CB, MC, V, C. Free parking. Full bar. Reservations. Prix fixe is $11.95 per adult, $5.95 per child under 12, free for children under 3. Specialties: roast turkey with potatoes, stuffing, vegetables and cranberry sauce, ham with sweet and sour sauce, a salad bar, a make-your-own ice cream sundae bar and a variety of cheeses and desserts.

The Greenbelt Hilton Towers, 6400 Ivy La. (in the Garden Room), Greenbelt. Tel.: 441-3700. Christmas Day buffet, 11 a.m. to 7 p.m. Cards: AE, DC, CB, MC, V, C. Free parking. Full bar. Reservations. Prix fixe is $16.95 per adult, which includes unlimited champagne, and $7.95 per child under 12. Specialties: smoked ham, smoked fish platter, charcuterie tray, shrimp creole, roast goose, veal fricassee, Italian sausages with peppers and onions, a large and varied salad bar, pecan glazed sweet potatoes, rice pilaf, broccoli polonaise (in a cream sauce), omelettes and assorted pastries, muffins, cakes and pies for dessert.

Oxon Hill Ramada Hotel, 6400 Oxon Hill Rd. (The Gallant Fox Restaurant), Oxon Hill. Tel.: 630-4050. Christmas Day a la carte dining from 11:30 a.m. to 7 p.m. Cards: AE, DC, MC, V. Free parking. Full bar. Reservations. Entree price range is $14.95 to $19.95 and half price for children . Specialties: seafood cocktail or consomme for an appetizer with house salad, turkey with chestnut stuffing, duck a l'orange, prime rib, filet mignon burnt with bernaise sauce or filet of sole for choice of entree, brussels sprouts, cauliflower au gratin or potatoes chateau for a vegetable and French pastry, English trifle or chocolate mousse for dessert.

Sebastian's Restaurant and Lounge, 1380 Piccard Dr., Rockville. Tel.: 948-1755. Christmas Day buffet from noon to 10 p.m. Cards: AE, DC, CB, MC, V, C. Free parking. Full bar. Prix fixe is $11.95 per adult and $6.95 per child, which includes a nonalcoholic beverage. Reservations. Menu includes a 125-item salad bar, fresh fruit, homemade breads and steamship round, beef, turkey, ham, lamb, lasagna, baked chicken oregano, broiled flounder, barbecued pork ribs, pastitsio and moussaka for entrees with sweet potatoes, cauliflower, peas and carrots, mashed potatoes, oven-browned potatoes, string beans and broccoli for vegetables, as well as pumpkin, apple, cherry, blueberry, lemon meringue, banana cream and chocolate pies, assorted cakes and rice pudding.