T.C. Williams and Madison remained unbeaten setting up tomorrow night's showdown and the Great Falls District continued its 1987 success as teams head into district play this weekend. In cross country, O'Connell continued its dominance in the Arlington Classic and Lake Braddock is clearly emerging as the area's top team in both boys and girls competition. Football

The Washington Post's top-ranked team, T.C. Williams, used another strong defensive performance in trouncing Lee, 28-0. The Titans allowed Lee 114 yards, but just 60 in the final three quarters. Lydell Scott rushed for 129 yards and a touchdown. T.C. Williams, hoping to avenge one of three 1986 losses, travels to Madison tomorrow night to meet the undefeated Warhawks.

Madison tuned up for that meeting with an easy 35-0 victory over McLean. Joey Jauch returned the opening kickoff 85 yards for a touchdown and the Warhawks added 21 more points in the first quarter.

The Great Falls District has four other undefeated teams but that number will be cut in half after this week's action. Herndon (2-0) plays Yorktown (3-0) and South Lakes (2-0) plays Marshall (2-0).

Herndon got three touchdowns from Warren Prisby, one on a 97-yard kickoff return, after a reverse and held on to surprise Robinson, 27-20. Yorktown's Greg Graham broke loose for his third long touchdown run in as many weeks (a 73-yarder) and the Patriots defense allowed just a fourth-quarter field goal in defeating Fairfax, 13-3.

South Lakes scored 28 unanswered points to defeat Chantilly, 28-6. Ed Muniak scored twice, once on a 65-yard run and again on a 33-yard pass from Justin Anderson. Defending Northern Region champion Marshall had to rally to defeat Mount Vernon, 14-10. The Statesmen, who shut out Mount Vernon in the regional final last year, got a touchdown from Joe Swarm in the fourth quarter to overcome the Majors. The touchdown was set up by Marion Jones' 47-yard fumble return.

William Weaver's 51-yard touchdown run in the third quarter propelled W.T. Woodson to a 14-13 victory over Annandale.

Cross Country

O'Connell's boys captured the Arlington County Meet for the fifth straight year. Yorktown senior Carter Tatum won the annual meet of the four Arlington schools by 31 seconds over Carter Matthews of Wakefield. Two of O'Connell's top five runners had the flu and didn't compete, but the Knights still placed five runners in the top eight.

In the girls race, Yorktown won for the second straight year and Maura McColgan captured the race for the second year in a row. She defeated Wakefield's Dina Spagnolia by 12 seconds.

Lake Braddock scored a sweep in the Judges Classic at Handley High School. Vince Hancock won the boys race in 13:31 and the Bruins finished with 37 points, 53 ahead of second-place Green Castle.

Jana Beckman of Annandale won the girls race in 16:04, but Lake Braddock placed third, fourth, fifth, sixth and eighth to defeat Chantilly for the team title.