AN ESTIMATED 100,000 of us, adults and kids, descend each fall and spring weekend on area soccer fields -- to such an extent that the term "field" is loosely applied, usually on a space-available basis.

If you're not yet a playing part of Washington's soccer world, the following list of leagues and contacts might help. Points to remember: Youth play predominates on Saturday, with house leagues, open to all comers, operated at dozens of clubs and other organizations. Sundays mean intense competition between specially selected youth squads in the National Capital Soccer League (NCSL) for boys and the Washington Area Girls Soccer League, commonly called WAGS. Many of these teams extend their match play to invitationals around the region (and, for the more accomplished "sides," the U.S. and farther).

Complementing youth play on the typical Sunday (Redskins games -- or the lack of them -- notwithstanding) is much of the area adult competition, which ranges from ethnic contests on the Mall to county recreational play for both men and women in the suburbs. Becoming increasingly popular is the coed game; the hotbed is Montgomery County.DISTRICT OF COLUMBIA

SOCCER ON THE HILL --

Open to all boys and girls, age 7 to 16. Games played on Saturdays in D.C. 546-0269.

STODDARD SOCCER LEAGUE --

Boys and girls 4 to 13. Fifty-two house teams play games on Saturday in D.C.; four specially selected travel teams play primarily on Sundays. P.O. Box 39203, DC 20016.

WARD 1 YOUTH SOCCER LEAGUE --

Boys and girls 9 to 12. Games played on Tuesdays and Thursdays at Marie Reed Recreation Center. 673-7611.

WARD 4 CO-REC SOCCER LEAGUE --

Boys and girls 8 to 16. Games played on Wednesdays and Saturdays at Takoma Recreation Center. 576-6854.

MARYLAND

MARYLAND STATE YOUTH SOCCER ASSOCIATION --

593-0535, 681-6866.

ANNAPOLIS SOCCER CLUB --

Boys and girls 9 to 15. Thirteen house teams play Saturdays in Anne Arundel County; one select travel team plays on Saturday and Sunday. 301/268-0157.

ANNE ARUNDEL COUNTY YOUTH SOCCER LEAGUE --

Boys and girls 8 to 17 who are county residents; play primarily on Saturday. 301/987-9600.

ARUNDEL SOCCER ASSOCIATION --

Boys, 6 to 16 (girls may play on boys' teams). Four house teams play on Saturday in Gambrills; one select house team plays on Saturday in Anne Arundel County; four select travel teams play primarily on Sunday. 301/672-1958.

BOWIE SOCCER ASSOCIATION --

Boys and girls 5 to 19. Approximately 20 house teams play on Saturday in Bowie; 15 select travel teams play primarily on Sunday. 262-2798.

CAPITAL BELTWAY INNER SOCCER LEAGUE --

Coed for boys and girls 6 to 11. Thirty-two teams from New Carrollton, Lanham, Beltsville, Lewisdale/University Hills, Greenbelt, College Park and Cheverly boys and girls clubs play on Saturday in Prince George's County. 577-0320.

CATHOLIC YOUTH ORGANIZATION LEAGUE --

Boys and girls, first through eighth grades (coed until fourth grade). Eighty-five teams play on Saturday and Sunday in Montgomery and Prince George's counties. 853-4502.

CHARLES COUNTY PARKS AND RECREATION COED --

Boys and girls 5 to 12, county residents, play on Tuesday, Thursday amd Saturday in Charles County. 301/934-9305.

CITY OF GAITHERSBURG RECREATION DEPARTMENT --

Boys and girls, first through ninth grade, play on Saturday in Gaithersburg. 926-1184.

FREESTATE SOCCER ALLIANCE --

Boys and girls 11 to 19. Five select travel teams play primarily on Sunday. 249-7185.

GREATER SEVERNA PARK ATHLETIC ASSOCIATION --

Boys and girls 6 to 16. Twenty-five house teams play on Saturday morning in Severna Park; 16 select house teams play on Saturday in Anne Arundel County; 12 select travel teams play primarily on Sunday. 301/544-3451.

HOWARD COUNTY COED INDOOR SOCCER LEAGUE --

Boys and girls 7 to 16. 301/992-2464.

KETTERING-LARGO BOYS AND GIRLS CLUB --

Boys and girls 5 to 18. Seven house teams play Saturday and Sunday in Maryland and Virginia; three specially selected travel teams play mostly Sundays. 249-9384.

MID-COUNTY ATHLETIC ASSOCIATION --

Boys and girls 10 to 16. House league merged with Kettering-Largo Boys and Girls Club; one select boys travel team plays primarily on Sunday. 249-5213.

MONTGOMERY COUNTY DEPT. OF RECREATION --

Boys and girls, elementary school through junior high, play on Saturday. 593-9670 for Silver Spring area; 540-1300 for Northern Montgomery County.

MONTGOMERY SOCCER, INCORPORATED (MSI) --

Boys and girls 6 to 18. About 400 open teams and 48 select house teams play on Saturday in Montgomery County; four select travel teams play primarily on Sunday. Open to teams from D.C., Virginia and Maryland. 294-8558 (Monday-Friday 9 to 1).

PRINCE GEORGE'S COUNTY BOYS & GIRLS CLUBS --

Boys (girls are allowed to participate) 8 to 13, play on Sunday in Prince George's County. 699-2422.

ROCKVILLE CO-REC SOCCER LEAGUE --

Boys and girls 8 to 14, play on Saturday in Rockville. 424-8000, ext. 340.

SOCCER ASSOCIATION OF COLUMBIA --

Boys and girls 6 to 19. Approximately 105 house teams play on Saturday in Columbia and Ellicot City; 20 select travel teams play on Saturday and Sunday. Also a Saturday-morning clinic for 6- and 7-year-olds, with an enrollment of 450. 301/730-1282.

SOUTH BOWIE BOYS AND GIRLS CLUB --

Boys and girls 5 to 15. About 30 house teams play Saturday and occasional weeknights in South Bowie; 10 select travel teams play Sunday. 262-3325.

TAKOMA PARK NEIGHBORHOOD YOUTH SOCCER --

Boys and girls 7 to 12. Ten house teams play on Saturday in Takoma Park. 445-7548, 585-4925.

WHEATON BOYS AND GIRLS CLUB --

VIRGINIA

VIRGINIA YOUTH SOCCER ASSOCIATION --

356-3252.

ALEXANDRIA SOCCER ASSOCIATION --

Boys and girls 5 to 19. Seventy-five house teams play on Saturday in Alexandria; 12 select travel teams play primarily on Sunday. 684-5425.

ANNANDALE BOYS CLUB SOCCER LEAGUE --

Boys and girls 4 to 19. Approximately 70 house teams play primarily on Saturday; eight select travel teams play primarily on Sunday. 941-4411 (Monday-Friday 4 to 8).

ARLINGTON SOCCER ASSOCIATION --

Boys and girls 6 to 19. One hundred eighty-two house teams play on Saturday in the county; 21 select travel teams play primarily on Sunday. 532-2088.

BRADDOCK ROAD YOUTH CLUB SOCCER --

Boys and girls 5 to 19. Approximately 150 house teams play on Saturday in Fairfax County; 30 select travel teams play primarily on Sunday. 378-8703.

BURKE SOCCER CLUB --

Boys and girls 5 to 18. Eighty-five house teams play on Saturday in Burke. 455-7851.

CHANTILLY SOCCER CLUB --

Boys and girls 9 to 19. Thirteen select travel teams play primarily on Sunday. 378-8703.

CHANTILLY YOUTH ASSOCIATION SOCCER LEAGUE --

Boys and girls 6 to 18. Seventy house teams play on Saturday in western Fairfax County. 476-5370.

FAIRFAX POLICE YOUTH CLUB SOCCER --

Boys and girls 5 to 19. About 100 house teams play on Saturday in Fairfax County; 15 select travel teams play primarily on Sunday. 273-7175.

FALLS CHURCH SOCCER CLUB --

Boys and girls 8 to 19. Three specially selected travel teams play primarily on Sunday. 560-8016.

GREAT FALLS ATHLETIC ASSOCIATION --

Boys and girls 6 to 18. Forty-four house teams play on Saturday; three select travel teams play primarily on Sunday. 759-5008.

HERNDON YOUTH SOCCER, INCORPORATED --

Boys and girls 6 to 19. Forty-six house teams play on Saturday in Herndon; nine specially selected travel teams play primarily on Sunday. 478-0224.

KINGS PARK WEST COED SOCCER LEAGUE --

Boys and girls 5 to 10. Eighteen house teams play on Saturday in Fairfax. 425-5473.

LEE-MOUNT VERNON SOCCER ASSOCIATION --

Boys and girls 6 to 18. Approximately 60 house teams play on Saturday and some weeknights in the Mount Vernon area. 765-5733, 922-8758.

LEE-MOUNT VERNON SOCCER CLUB --

Boys and girls 9 to 19. Ten specially-selected travel teams play primarily on Sunday. 780-6210.

LITTLE RIVER SOCCER CLUB --

Boys and girls 6 to 19. Eleven specially selected travel teams play primarily on Sunday. P.O. Box 1327, Falls Church VA 22041.

LOUDOUN YOUTH SOCCER ASSOCIATION --

Boys and girls 5 to 18 play on Saturday in Loudoun County. 703/338-5722, 703/777-6024.

MANASSAS AREA SOCCER ASSOCIATION --

Coed, boys and girls 6 to 18. Approximately 60 house teams play on Saturday in Manassas. 703/368-3394.

McLEAN YOUTH SOCCER LEAGUE --

Boys and girls 6 to 18. Over 100 house teams play on Saturday; 18 select travel teams play primarily on Sunday. 821-0828.

MID-COUNTY SOCCER ASSOCIATION --

Boys and girls 5 to 17 play on Saturday in Prince William County. 703/369-2190.

NATIONAL CAPITAL SOCCER LEAGUE (NCSL) --

Boys (girls allowed) 9 to 19. Amalgam of 340 selected travel teams from Virginia, Maryland and D.C. who play primarily on Sunday. 471-8517.

PRINCE WILLIAM SOCCER, INCORPORATED --

Boys and girls 6 to 19. One hundred sixty-seven house teams play on Saturday in the county; 35 select travel teams play primarily on Sunday. 703/670-6664.

RESTON SOCCER ASSOCIATION --

Boys and girls 6 to 19. Approximately 150 house teams play on Sunday, occasionally Saturday, mostly in Reston, remainder around Northern Virginia; 20 select travel teams play primarily on Sunday. 860-8798.

SPRINGFIELD YOUTH CLUB --

Boys and girls 5 to 19. Approximately 220 house teams play seven days a week mostly in the Springfield area; about 30 select travel teams play primarily on Sunday. 451-0478.

STERLING YOUTH SOCCER ASSOCIATION --

Boys and girls 6 to 19. Approximately 60 house teams play on Saturday in Sterling; about 23 specially selected travel teams play on Sunday. 450-6133.

VIENNA YOUTH SOCCER, INCORPORATED --

Boys and girls 6 to 19. About 90 house teams play on Saturday and Sunday in the Vienna area; 12 select travel teams play on Saturday and Sunday. 560-6924.

VIRGINIA BLACK WATCH SOCCER CLUB --

Boys 9 to 19. Eight independent specially selected travel teams play on Saturday and Sunday. 451-4458.

VIRGINIA INDEPENDENT SOCCER TEAMS (VISTA) --

Boys and girls, 9 to 19; 38 select travel teams play on Sunday. 569-0543.

WASHINGTON AREA GIRLS SOCCER LEAGUE (WAGS) --

Girls 8 to 19. Amalgam of 168 specially selected travel teams which play on Sunday, occasionally on weekdays and Saturdays in Virginia and Maryland (open to District residents). 385-8012. Adults DISTRICT OF COLUMBIA

CENTRAL AMERICA SOCCER LEAGUE --

Men, 20 and older. Twelve teams, players largely of Hispanic descent, play on Sunday in D.C. 698-9369.

EL SALVADOR SOCCER ASSOCIATION --

Men, 18 and older, play Saturday and Sunday at Banneker High School. 673-7611.

GUATEMALAN SOCCER LEAGUE --

Men, 20 and older. Thirteen teams of Hispanic background play on Sunday in D.C. and Northern Virginia. 779-5934.

INDEPENDIENTE LEAGUE --

Men, 20 and older. Twelve teams of Central American extraction play on Sunday in D.C. 823-0672.

INTERNATIONAL SOCCER LEAGUE --

Men, 20 and older. Eight teams, comprised largely of Hispanics, play on Sunday in D.C. Due to merge with Central America League in November. 524-1562.

NATIONAL SOCCER LEAGUE --

Men, 19 and older. Currently nine teams in top-level amateur play on Sunday at 16th & Kennedy NW and RFK practice fields. 362-4873.

MARYLAND

ANNE ARUNDEL COUNTY ADULT SOCCER LEAGUE --

Men 18 and older (women are permitted; high school students are not). Games played on Sunday in Anne Arundel County. 301/987-9600.

ANNE ARUNDEL COUNTY COED OVER-30 --

Men and women 30 and older. Games played on Thursday nights in the county. 301/987-9600.

CAPITAL SOCCER LEAGUE --

Men 19 and older, professional and amateur. Eleven top-level teams play on Sunday in Maryland and D.C. 774-9455.

GODDARD SOCCER LEAGUE --

Adult coed. Games played Saturday, Monday-Thursday at Goddard Space Center. Strictly for Goddard employees, contractors, families. 731-2044, ext. 254.

GREENBELT RECREATION DEPARTMENT ADULT --

Coed, games played on Saturday in Greenbelt. 474-6878.

INDEPENDENT SOCCER LEAGUE OF MARYLAND --

Men, 18 and over. Games played on Sunday in Montgomery County. 927-4296 or 439-9418.

MARYLAND NATIONAL CAPITAL PARKS AND PLANNING COMMISSION --

Adult women, games Thursday evening in Prince George's County. 699-2422.

MID-MARYLAND SOCCER ASSOCIATION --

Men 18 and older. Sixteen teams play in two divisions with many former college players. Games played on Sunday in Montgomery and Prince George's counties. 422-7955.

MONTGOMERY COUNTY CO-REC --

Men and women 18 and older or high school grads. Forty teams play on Sundays. 468-4176.

MONTGOMERY COUNTY MEN'S OPEN DIVISION --

Men 18 and older and high school grads. More than two dozen teams play on Sundays. 468-4210.

MONTGOMERY COUNTY MEN'S 35-AND-OVER --

Sixteen teams play on Sunday. 468-4176.

MONTGOMERY COUNTY MASTERS --

Women 30 and older. Fourteen teams play on Saturday. 468-4176.

MONTGOMERY COUNTY WOMEN'S OPEN DIVISION --

Women 18 and older or high school grads. Twelve teams play on Saturday in Montgomery County. 468-4176.

SOCCER ASSOCIATION OF COLUMBIA WOMEN'S --

Women 17 and older. Twenty teams play in Howard County. 301/381-7214.

TAKOMA PARK SOCCER ASSOCIATION --

Men. Games played on Sunday in Montgomery County. P.O. Box 5431, Takoma Park MD 20912.

VIRGINIA

ALEXANDRIA ADULT COED SOCCER LEAGUE --

Men and women 18 and older. Games Monday-Friday nights in the city. 838-4345.

AMERICAN SOCCER LEAGUE --

Men 16 and over, with an international flavor. Games Sunday in Arlington. 687-1581.

ANNANDALE BOYS' CLUB COED --

Men and women. Games Saturdays, occasional Sundays, in Annandale. 941-4411 (Monday-Friday 4 to 8 p.m.)

ARLINGTON SOCCER ASSOCIATION MEN'S LEAGUE --

Men 19 and older. Games played on Saturdays. 532-2088.

ARLINGTON WOMEN'S --

18 and older. Games played on Sundays. 751-4906, 532-7794.

CAPITAL WOMEN'S SOCCER LEAGUE --

Games played on Sundays, some weekdays, in D.C., Maryland and Northern Virginia. 250-9040.

FAIRFAX WOMEN'S --

18 and over. Games on Saturday, some weeknights in Fairfax County. 280-2506.

MANASSAS AREA COED LEAGUE --

NORTHERN VIRGINIA COACHES LEAGUE --

Men, open and over-30 divisions. Games played on Saturday afternoons in Northern Virginia. 591-2333.

NORTHERN VIRGINIA SOCCER LEAGUE --

Men. Games on Sundays, weeknights, in Northern Virginia. 971-6714, 941-0381.

PRINCE WILLIAM SOCCER, INCORPORATED --

Coed, men and women 19 and older. Games Saturday in Prince William County. 703/670-9197.

RESTON SOCCER ASSOCIATION --

Men. Games played mostly on Saturdays in Northern Virginia. 860-8798.

WASHINGTON AREA WOMEN'S --

Women 17 and older, Saturday afternoon in Virginia, Maryland and D.C. 920-4020.

WASHINGTON AREA WOMEN'S MASTERS --

Women 30 and older, play Tuesday, Thursday and Friday evening in Northern Virginia. 920-4020.

WASHINGTON INTERNATIONAL SOCCER LEAGUE --

Men. Games played on Saturdays and Sundays in Maryland, Virginia and D.C. 759-4237.