COLLEGE PARK NEEDLE ARTS, an informal gathering to work on quilting, knitting, embroidery and counted cross-stitch, sponsored by the College Park Needle Arts Society. 9:30-11:30 a.m., Old Parish House, 4711 Knox Rd., College Park. Free. 301-277-9630.
UPPER MARLBORO NATURE WALK, for ages 5 and older, a hike to see wetland plants, frogs, birds and signs of beaver activity; dress appropriately. 6:30-8 p.m., Watkins Nature Center, 301 Watkins Park Dr., Upper Marlboro. $2; residents of Prince George's and Montgomery counties, $1. Registration required. 301-218-6702.
PORT TOWNS PADDLESPORT REGATTA, for scullers, canoeists and kayakers of all ages and abilities. More than 30 events, including a two-mile course and a short slalom course on a scenic area of the Anacostia River, from the National Arboretum to Bladensburg Waterfront Park; participants receive a free T-shirt. Parking and launching facilities available; bring watercraft and gear. Sponsored by Anacostia Watershed Society. 10 a.m.-2 p.m., Bladensburg Waterfront Park, 4601 Annapolis Rd., Bladensburg. The entry fee is $15 per person, per race if mailed by Sept. 18; the entry fee on race day will be $20. Registration required; call 301-699-6204 or go to www.anacostiaws.org.
LARGO STORY TIME, for ages 3-5. 10:30 a.m., Largo-Kettering Library, 9601 Capital Lane, Largo. Free. 301-336-4044.
GLENARDEN LIBRARY MEETING, Friends of the Glenarden Library discuss fundraising, volunteering and special projects. 10:30 a.m., Glenarden Library, 8724 Glenarden Pkwy., Glenarden. 301-699-3500.
BACK-TO-SCHOOL FESTIVAL, for ages 5-12 and older, accompanied by an adult. Story time, a puppet show and games; hot dogs, hamburgers, chips and drinks will be sold. 11 a.m.-3 p.m., Allentown Fitness and Splash Park, 7210 Allentown Rd., Fort Washington. $5; residents of Prince George's and Montgomery counties, $4. 301-449-5567.
BOWIE AUTHOR APPEARANCE, Michelle T. Johnson discusses her book "Working While Black: The Black Person's Guide to Success in the White Workplace." 2 p.m. Karibu Books, 15624 Emerald Way, Bowie. Free. 301-352-4110.
HYATTSVILLE AUTHOR APPEARANCE, Melvin Murphy discusses his book "It's Who You Know! Creating Mentor-Based Alliances and Partnerships Through Networking." 2 p.m. Karibu Books, 3500 East West Hwy., Hyattsville. Free. 301-559-1140.
LAUREL NIGHT HIKE, for all ages, a guided hike to look and listen for owls, bats, bugs and more. 6:45-8:15 p.m., National Wildlife Visitor Center, Powder Mill Road, between Baltimore-Washington Parkway and Route 197, Laurel. Free; registration required. Call 301-497-5887 or go to www.patuxent.fws.gov.
FORT WASHINGTON FITNESS EVENT, for ages 18 and older, jazz and oldies music played during toning and stretching exercises or a yoga class. 7-9 p.m., Tucker Road Community Center, 1771 Tucker Rd., Fort Washington. $5; reservations required. 301-248-4404.
UPPER MARLBORO RUN-WALK EVENT, for all ages, a 5K run or a one-mile walk, with water stations along the route, rain or shine. There will be an awards ceremony honoring the top three male and female finishers; proceeds benefit an emergency fund for crime victims, sponsored by Reaching Objectives Through Joint Actions Inc. and the Prince George's County State's Attorney's Office. Check-in and registration, 7:15 a.m.; start, 8:30 a.m. Watkins Regional Park, 301 Watkins Park Dr., Upper Marlboro. Registration required. $15; on race day, $20. Call 301-952-3801 or register online at www.pgcvictimsfundrun.net.
WILDFLOWER NATURE PROGRAM, for ages 16 and older, the role of wildflowers in the ecosystem and methods of identifying them. Bring a field guide, water and a magnifying glass. 9-11 a.m., Patuxent Research Refuge, North Tract, Route 198, between the Baltimore-Washington Parkway and Route 32, Laurel. Free; reservations required. Call 301-497-5887 or visit the Web site www.patuxent.fws.gov.
MITCHELLVILLE ITALIAN FESTIVAL, Italian music and dancers, children's rides, games and prizes; homemade Italian food for sale. 11 a.m.-6 p.m., on the grounds of the Villa Rosa Home, 3800 Lottsford Vista Rd., Mitchellville. Free. 301-459-4700.
HISPANIC FESTIVAL, ethnic food and music, carnival games, petting zoo, children's rides and crafts. Noon-6 p.m., Lane Manor Park, 7601 West Park Dr., Adelphi. Free. 301-445-4500.
LANDOVER SENIORS FITNESS AND SWIM, ages 60 and older use the fitness center and swimming pool. 8 a.m.-noon. Mondays, Wednesdays and Fridays, Prince George's Sports and Learning Complex, 8001 Sheriff Rd., Landover. Free for residents of Prince George's and Montgomery counties. 301-583-2400.
FORT WASHINGTON SCRABBLE GROUP, for all skill levels, how to improve your game strategy. 6:45 p.m., Sipp'ss Cafe, 10707 Indian Head Hwy., Fort Washington. Free. 301-868-6360.
HILLCREST HEIGHTS CHESS CLUB, for all ages and skill levels, with instructor Paul Yates. 7 p.m., Hillcrest Heights Library, 2398 Iverson St., Temple Hills. Free. 301-630-4900.
LARGO STORY TIME, for all ages. 10:30 a.m. Tuesdays and Thursdays, Borders Books & Music, 931-A Capital Centre Blvd., Largo. Free. 301-499-2174.
CLINTON STORY TIME, for ages 3-5. 10:15 a.m., 11 a.m. and 11:45 a.m., Surratts-Clinton Library, 9400 Piscataway Rd., Clinton. Free. 301-868-9200.
NEW CARROLLTON STORY TIME, for ages 3-7. 7 p.m., New Carrollton Library, 7414 Riverdale Rd. Free. 301-459-6900.
LARGO CHESS CLASS, for all ages, with instructor Guy Charity. 7 p.m., Largo-Kettering Library, 9601 Capital Lane, Largo. Free. 301-336-4044.
FORT WASHINGTON TEA, classical guitar, Brazilian and Latin American music. 2 p.m., Harmony Hall Regional Center, 10701 Livingston Rd., Fort Washington. $10. 301-203-6070.
NEW CARROLLTON TEENS BOOK TALK, for ages 13-18, about "The Thief Lord," a novel by Corneila Funke, a suspense tale of two recently orphaned brothers, ages 5 and 12, who run away when an aunt wants to adopt only the younger one. 4:30 p.m., New Carrollton Library, 7414 Riverdale Rd., New Carrollton. Free. 301-459-6900.
FAIRMOUNT HEIGHTS CHESS CLUB, for all ages, with instructor Ted Fagan. 5 p.m., Fairmount Heights Library, 5904 Kolb St., Fairmount Heights. Free. 301-883-2650.
AUTHOR READING, Monique W. Morris reads from her novel, "Too Beautiful for Words," about Peaches, a naive high school girl, who falls under the influence of a hustler. 6:30 p.m., Karibu Books, 15624 Emerald Way, Bowie. Free. 301-352-4110.
WILDLIFE TRAM TOUR, wildlife and habitats seen from an electric, open-air tram. 5:45-6:45 p.m., National Wildlife Visitor Center, Powder Mill Road, between Baltimore-Washington Parkway and Route 197, Laurel. $3; ages 55 and older, $2; ages 12 and younger, $1. Exact change and registration required. 301-497-5887.
HOME-SCHOOLING SEMINAR, ideas for home-schooling, library resources offered and state requirements. 7 p.m., New Carrollton Library, 7414 Riverdale Rd., New Carrollton. Free. 301-459-6900.
BOWIE AUTHOR EVENT, Linda Perlstein, discusses her book "Not Much Just Chillin': The Hidden Lives of Middle Schoolers," about a year in the lives of five suburban Maryland middle school children. 7 p.m., Bowie Library, 15210 Annapolis Rd., Bowie. Free. 301-262-7000.
GLENARDEN STORY TIME, for ages 2-5. 10:30 a.m., Glenarden Library, 8724 Glenarden Pkwy., Glenarden. Free. 301-772-5477.
HILLCREST HEIGHTS STORY TIME, for ages 2-5. 10:30 a.m., Hillcrest Heights Library, 2398 Iverson St. Free. 301-630-4900.
COLLEGE PARK PETER PAN CLUB, for ages 3-5 accompanied by an adult, aviation-based activities, including flying stories, pedal planes, crafts and games. 10:30 a.m.-noon the second and fourth Thursdays of each month, College Park Aviation Museum, 1985 Cpl. Frank Scott Dr., College Park. Free with regular museum admission of $4; seniors, $3; ages 2-18, $2; ages 1 and younger, free. 301-864-6029.
COLLEGE PARK ARCHIVES TALK, archivists Rodney Ross and Wayne deCesar and archives specialist George Briscoe discuss the records of the Southern Claims Commission and how to use them for family or other research. 11 a.m., National Archives at College Park, Lecture Room C, 8601 Adelphi Rd., College Park. Free; reservations requested. 202-501-5000, Ext. 5.
LARGO STORY TIME, for ages 3-5. 11 a.m., Largo-Kettering Library, 9601 Capital Lane, Largo. Free. 301-336-4044.
-- Compiled by LISA MARTIN
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