The Fairfax County Park Authority and Board of Supervisors will celebrate the 1 millionth rider of the miniature train at Burke Lake Park. The celebration will be from 11 a.m. to 6 p.m. Saturday. The train has been in operation since 1967.

Free musical entertainment, puppet and magic shows will be provided. The rain date is from 11 a.m. to 6 p.m. Sunday.

The park can be reached by taking Exit 5 west from the Capital Beltway, then turning left on Burke Lake Road (Rte. 645) and left on Ox Road (Rte. 123). For Fairfax residents, the park is about six miles south of Fairfax Court House via Rte. 123.

Redskin quarterback Jay Schroeder will be roasted tomorrow night at the Tysons Corner Holiday Inn. The roast is sponsored by the AMC Cancer Research Center.

Schroeder agreed to be the target for the evening's fun to raise funds for the research center, an independent, nonprofit organization. A portion of the proceeds from this year's roast will be devoted to an AMC leukemia research grant in the name of Timmy Riley, the son of Redskin coach Dan Riley who has been diagnosed with the disease.

Some of the Redskins who will take turns jabbing teammate Schroeder are Charles Mann, Russ Grimm and Don Warren. Fairfax County Board Vice Chairman Martha Pennino (D-Centreville) is this year's honorary chairwoman.

The evening will begin with a reception at 7 p.m., dinner at 8 and the roast at 9. Donations for the celebrity roast are $150 per person or $1,500 for a table of 10. A corporate sponsorship package, which includes a table for 10 and a celebrity roaster as a guest, ranges in cost from $1,500 to $3,500.

For more information call executive director Pam Haberstroh at 550-7080.

The City of Alexandria Division of Substance Abuse will offer a "Kids Are Terrific" (K.A.T.) program to Alexandria youth in the fourth through sixth grades.

K.A.T., a structured summer camp, will meet from 9 a.m. to 3 p.m. Monday through Friday from June 22 to July 31 at George Washington Junior High School, 1005 Mount Vernon Ave., Alexandria. Transportation and lunch will be provided.

K.A.T. will feature sports, drama, arts and crafts, games and field trips as part of a program designed to inform and assist youngsters with substance abuse prevention. The camp is staffed by Division of Substance Abuse counselors and peer counselor aides.

The cost of the program is $60 per week. Scholarships are available and no one will be denied attendance solely because of an inability to pay.

K.A.T. is sponsored by the City of Alexandria Community Mental Health and Mental Retardation Services Board. For further information or registration, call 370-0815.