A Biker Weekend

The American Lung Association of Northern Virginia will conduct its annual Back Roads Bike Trek on Saturday and Sunday. Bikers will travel 100 miles from outside Manassas to Fredericksburg and back, staying overnight at the Fredericksburg Holidome. All proceeds will benefit the association in its fight against lung disease. Call 591-4131. Back in the Work Force

The Alexandria Office on Women is offering a workshop series for women interested in re-entering the work force. Meetings will be 10 a.m. to noon on four consecutive Wednesdays beginning next week at the Alexandria Office on Women, 110 N. Royal St., Room 201. Reservations are required. Call 838-5030. Do You Speak English?

Fairfax County Adult Education is offering classes in English as a second language beginning next week. The classes, both daytime and evening, will be offered for all levels of English proficiency at 18 locations throughout the county. Testing and registration of new students is required. To register and for information on testing, tuition and eligibility for free classes, call 893-1093 or 536-2048. Chorale Auditions

The Reston Chorale will conduct auditions for its 1990-91 season from 7 to 9 p.m. Monday at the Reston Community Center, 2310 Colts Neck Rd. Auditions are by appointment; music and an accompanist are provided. Call 742-9194. Fruit Fest

Celebrate spring at Bethel United Church of Christ's Strawberry Festival from 4 to 8 p.m. Saturday. There will be hot dogs, baked goods, crafts and, of course, strawberries. The church is at 4347 Arlington Blvd. in Arlington. Call 528-0937. Adoption Services

The Fairfax County Department of Human Development is seeking families to adopt minority children varying in age from birth to 16 years. The greatest need is for boys over 6 years and for sibling groups. An adoptive parent can be married, single or divorced and may rent or own a home. Free adoption classes are ongoing and financial aid may be available. Call Tilly Blanding or Hedi Fortune at 246-7666 or 246-7639. Two Men and a Tuna

Washington-Lee High School will present "Greater Tuna," a two-man comedy about a small town called Tuna. Performances are at 8 p.m tomorrow and at 2 p.m. Saturday. Tickets are $3. Call 356-6200. Wanted: Used Books

Finished reading that pile of books? Help the McLean Branch of the American Association of University Women by donating your tomes to their 21st annual used-book sale. Donations are tax deductible and can be dropped off between 10 a.m. and 4 p.m. on Saturday and June 9, July 7 and 21, and Sept. 15, 22 and 29 at the McLean Giant Food Store, 1454 Chain Bridge Rd. Call 734-0523 or 938-4452. Artists Open Studios

Visit 31 artists in their studios from 11 a.m. to 4 p.m. Saturday at the Columbia Pike Artists Studios, 932 S. Walter Reed Dr. in Arlington. Admission is free. Call 486-9368.