There are plenty of lights illuminating Montgomery County this weekend -- helping to usher in the holiday season. They are as follows:


Throughout Brookside Gardens, displays of plants, animals and fountains contain more than 500,000 lights. 5:30 to 9 p.m. today through Sunday. Brookside Gardens, 1800 Glenallan Ave., Wheaton. $10, cars; $120, buses. Cash only. Buses must be registered in advance. 301-962-1453.


Holy Cross Hospital presents its "Lights of Love" celebration. A 25-foot-tall tree in front of the hospital features thousands of white lights and red bows. Residents can sponsor lights on the tree in honor or in memory of someone. The names of those who are remembered will be included in an album of honor on display in the hospital lobby until January. The lighting ceremony is at 4:30 p.m. Saturday. Holy Cross Hospital, 1500 Forest Glen Rd., Silver Spring. Free. For more information about sponsoring lights, call 301-754-7130.


More than 300,000 colored lights illuminate the grounds of the Washington Temple this holiday season. Outdoor Christmas lights and live outdoor Nativity scenes are from 6 to 9 p.m. daily. Regional music groups perform holiday music from 7 to 8 p.m. daily. In addition, the festival includes international Nativity scenes, video presentations, and 15 10-foot-tall trees decorated in Scriptural themes. Washington D.C. Temple Visitors Center, 9900 Stoneybrook Dr., Kensington. Free. 301-587-0144.


The Montgomery County Historical Society presents a 12-foot-tall lighted tree in front of the Waters House. The tree will be lighted after dark daily through Dec. 31. 12535 Milestone Manor Lane, Germantown. Free. 301-762-1492.


Residents can stroll through Olde Towne Gaithersburg and view the city's tree decorated with lights at the free "Twilight Tradition" event. Entertainment includes singers, musicians, and puppet and magic shows. The annual tree lighting is at 6:30 p.m. Saturday. Also, the Winter Lights Festival at Seneca Creek State Park features 3.5 miles of more than 300 light displays, including grazing deer, teddy bears, snowmen, polar bears, arches, toy soldiers, candy canes, snowflakes and more. Seneca Creek State Park, 11950 Clopper Rd., Gaithersburg. 6 to 9 p.m. Sundays to Thursdays; 6 to 10 p.m. Fridays and Saturdays, through Dec. 31 (closed Dec. 25). $10, cars; $25, 15-passenger vans; $50, buses. For more information, call 301-258-6350.