Sunday 23 NATURE WALK, join a park ranger for a two-mile hike to the Hickory Ridge and Batestown communities to learn about life before the civil rights movement. Sponsored by the National Park Service. 1-3:30 p.m., Parking Lot D, Prince William Forest Park, Park Entrance Road, Triangle. Free; registration required. 703-221-7181.

FEDERAL RE{acute}SUME{acute} WORKSHOP, how and where to start a search for a federal job. Sponsored by the Prince William Library System. 1-3 p.m., Potomac Community Library, 2201 Opitz Blvd., Woodbridge. Free; registration required. 703-494-8126.

Monday 24 ANNUAL AUCTION, by the Cabin Branch Quilters. 7:30 p.m., Lake Ridge Baptist Church, 12450 Clipper Dr., Woodbridge. 703-494-2481.

ENVIRONMENTAL PROGRAM, learn about stream conditions on local waterways. Sponsored by the Prince William Conservation Alliance. 7:30 p.m., Evergreen Fire Hall, 3510 James Madison Hwy., Gainesville. 703-367-0069.

Tuesday 25 ALZHEIMER'S SUPPORT, sponsored by the Prince William Senior Center. 7 p.m., 13850 Church Hill Dr., Woodbridge. 703-497-0741.

CARDIAC SUPPORT, for patients and family members, sponsored by Potomac Hospital. 7 p.m., Potomac Center (next to the hospital), Suite 320, 2296 Opitz Blvd., Woodbridge. 703-221-2500.

WRITERS ROUNDTABLE, to provide fellowship, resources and editorial assistance to local writers. 7:30 p.m., Francis Cannon VFW Hall, 9304 Centreville Rd., Manassas. 703-494-4260.

GENEALOGY RESOURCES WORKSHOP, share information about genealogy software, electronic resources and Internet sites, sponsored by the Prince William Public Library System. 7:30-8:30 p.m., Bull Run Regional Library, 8051 Ashton Ave., Manassas. Free; registration required. 703-792-4500.

PAGER ASSOCIATION, support for parents of children with gastroesophageal reflux. 7 p.m., Conference Room 1, Wellness Center, Prince William Hospital, 8700 Sudley Rd., Manassas. 703-257-7691.

BULL RUN TROUBADOURS, 7:30 p.m., Trinity Episcopal Church, Battle and Church streets, Manassas. 703-753-2249.

LIBRARY STORY TIME, sponsored by the Prince William Public Library System. For children 2-3, 10:30 and 11:30 a.m., Bull Run Regional Library, 8051 Ashton Ave., Manassas, 703-792-4500. For preschool groups of five or more, 10:30 a.m., Potomac Community Library, 2201 Opitz Blvd., Woodbridge, 703-494-8126. For children 3-6, 10:30 a.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. 703-792-4800. Free; registration required.

BOOK DISCUSSION, "Standing in the Rainbow," by Fannie Flagg, sponsored by the Prince William Library System. 7 p.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. Free; registration required. 703-792-4800.

Wednesday 26 PRINCE WILLIAM CHESS CLUB, 7-9 p.m., Potomac Community Library, 2201 Opitz Blvd., Woodbridge. 703-670-5887.

NATURE WALK, to observe the American woodcock's spring territorial and courtship flights; sponsored by Friends of Bull Run. 6-8 p.m. today and tomorrow, Bull Run Mountain House, 17405 Beverly Mill Dr., Broad Run. Members $5, non-members $10; reservations required. 703-753-2631.

TOASTMASTERS INTERNATIONAL, Lake Ridge Club No. 8913. 7:30 p.m., Tall Oaks Community Center, 12399 Hedges Run Dr., Lake Ridge. 703-494-5530.

WRITERS GROUP, 7:30 p.m., Borders Books & Music, 2904 Prince William Pkwy., Woodbridge. 703-897-8100.

LIBRARY STORY TIME, sponsored by the Prince William Public Library System. For children 2-3, 10:30 a.m., Potomac Community Library, 2201 Opitz Blvd., Woodbridge, 703-494-8126. For children 2-5, 10:30 a.m., Central Community Library, 801 Mathis Ave., Manassas, 703-361-8211. For children 3-6, 4 p.m., Bull Run Regional Library, 8051 Ashton Ave., Manassas, 703-792-4500. For children 3-8, 4 p.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. 7037924800. Free; registration required.

WEB RESOURCES FOR SENIORS, learn about Virginia's online health and aging resources; sponsored by the Prince William Library System. 9 a.m., Potomac Community Library, 2201 Opitz Blvd., Woodbridge, Free; registration required. 703-494-8126.

Thursday 27 LIBRARY STORY TIME, sponsored by the Prince William Public Library System. For children 4-6, 10:30 a.m., Bull Run Regional Library, 8051 Ashton Ave., Manassas, 703-792-4500. For children of all ages, 10:30 a.m., Potomac Community Library, 2201 Opitz Blvd., Woodbridge, 703-494-8126. For children 6-12, 3 p.m., Potomac Community Library, 2201 Opitz Blvd., Woodbridge, 703-494-8126. Free; registration required.

CANCER SUPPORT, for patients and family members, sponsored by Potomac Hospital. 7 p.m., Potomac Center (next to the hospital), Suite 320, 2296 Opitz Blvd., Woodbridge. 703-221-2500.

Friday 28 USED BOOK SALE, sponsored by Friends of Potomac Community Library. 10 a.m.-4 p.m. today and tomorrow; noon-2 p.m. Sunday. Potomac Community Library, 2201 Opitz Blvd., Woodbridge. 703-494-8126.

BACK DOOR FRIENDS, noon, River Woods Community Center, 16573 Nanticoke Rd., Woodbridge. 703-221-5513.

Saturday 1 CRAFT FAIR, sponsored by the Woodbridge Senior High Orchestra Boosters. 9 a.m.-3 p.m., at the school, 3001 Old Bridge Rd., Woodbridge. 703-490-3988.

INCOME TAX ASSISTANCE, through April 12, provided by Volunteer Income Tax Assistance (VITA) and sponsored by the Prince William Library System. 10 a.m.-2 p.m. Saturdays, Bull Run Regional Library, 8051 Ashton Ave., Manassas; 10 a.m.-1 p.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge; 10 a.m.-2 p.m. Saturdays and 6-8 p.m. Tuesdays, Potomac Community Library, 2201 Opitz Blvd., Woodbridge. 703-792-4500, 703-792-4800 and 703-494-8126.

RECOVERY INC., for people experiencing anxiety, depression, fear and other emotional problems. 10 a.m.-noon, Cokesbury United Methodist Church, 14804 Blackburn Rd., Woodbridge. 703-490-5423.

BILINGUAL STORIES, in Spanish and English, for children of all ages; sponsored by the Prince William Public Library System. 11 a.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. 703-792-4800.

RECYCLING PROJECT, accepting newspapers, magazines and aluminum cans; sponsored by Boy Scout Troop 1196. 9 a.m.-1 p.m., Woodbridge Senior High School, 3001 Old Bridge Rd., Woodbridge. 703-590-0511.

BABYSITTER TRAINING, an American Red Cross course emphasizing safety, basic care and first aid. Also, a class in CPR training. Sponsored by the Prince William Park Authority. 8 a.m.-4 p.m., Chinn Aquatics and Fitness Center, 13025 Chinn Park Dr., Woodbridge. $50; $40 additional for CPR class; registration required. 703-730-1000.

-- Compiled by Camille Ross

Items are accepted on a space-available basis from public and nonprofit organizations only, and must be received at least 14 days before the Sunday publication date. Submit information to: This Week, The Washington Post, 9420 Battle St., Manassas, Va. 20110. Include event name, dates and times, exact address, cost and a publishable contact phone number. For more information, call 703-392-1303.