The festival is one of the largest single-day high school lacrosse events in the country. The games will begin at 9:30 a.m.

Samson, a standout player for Radnor before her graduation in 1998, suffered a spinal cord injury in a January 2000 sledding accident that left her paralyzed from the chest down. Proceeds from the festival are used to fund spinal- cord-injury research and help provide care for patients with such injuries. More than $750,000 has been raised over the years.

One of the top boys' games, scheduled for 11:30 a.m., will pit La Salle, rated No. 1 by LaxPower, against No. 3 Ridley. The defending Catholic League champion Explorers won 18 of their first 19 games. Ridley was 12-1 after a 20-3 Central League win over Marple Newtown on Tuesday.

Malvern Prep, ranked No. 2, will face No. 13 Abington at 1:30 p.m., while No. 4 Haverford School will take on defending Pennsylvania Scholastic Lacrosse Association champion Downingtown East, the No. 9 team, at 1:30 p.m.

Other top 10-rated teams in action will be No. 5 Conestoga, No. 8 Penn Charter, and No. 10 Central Bucks East.

On the girls' side, Radnor's powerful scoring machine, rated No. 1 by laxpower.com, will square off against No. 29 Germantown Academy at 11:30 a.m. The Red Raiders outscored the opposition, 200-48, in their first 10 games.

Other top-10 rated girls' teams in action at the festival will include No. 2 Abington, No. 3 Great Valley, No. 6 Springfield (Delaware County), No. 7 Episcopal Academy, No. 9 Downingtown East, and No. 10 Strath Haven.

The Schedules

BOYS

9:30 a.m.: Radnor vs. St. Joseph's Prep, Marple Newtown vs. Archbishop Carroll, Great Valley vs. Tatnall. 11:30 a.m.: Ridley vs. La Salle, Lower Merion vs. Episcopal, Haverford High vs. Shipley. 1:30 p.m.: Downingtown East vs. Haverford School, Springfield (D) vs. Germantown Academy, Abington vs. Malvern Prep. 3:30 p.m.: Conestoga vs. Lawrenceville Prep, Downingtown West vs. Hill School, Central Bucks East vs. Penn Charter.

GIRLS

9:30 a.m.: Springfield (D) vs. Episcopal Academy, Lower Merion vs. Springside, West Chester Henderson vs. Shipley. 11:30 a.m.: Radnor vs. Germantown Academy, Conestoga vs. Penn Charter, Downingtown East vs. Villa Maria Academy. 1:30 p.m.: Abington vs. Lawrenceville Prep, Strath Haven vs. Tower Hill, Marple Newtown vs. Hill School. 3:30 p.m.: Great Valley vs. Agnes Irwin, Ridley vs. Archbishop Carroll, Plymouth Whitemarsh vs. Baldwin.

- Don Beideman