A sprint triathlon tests an individual's speed at running, cycling and swimming – but you may also want to add "signing up" to that list.

Registration for the second annual Sleepy Hollow Sprint Triathlon opened yesterday, and already over 100 contestants have registered for the event (organizers say they want to cap entries at about 350).

"We're all hoping for another very successful event, and people already seem to be really excited," said Veronica Skrelja, one of the organizers and an employee of Sleepy Hollow Physical Therapy.

The race takes place on June 13, 2010. It kicks off and ends in Kingsland Point Park and involves a half-mile swim, 3-mile run and a 10-mile bike ride around the historic locations of Sleepy Hollow.

"Last year was a great, even for the first year," Skrelja said. "It was a lot of fun – we had recreational teams, and had true triathletes."

The event benefits the The Leukemia & Lymphoma Society; last year, over $45,000 was raised for the cause.

Dennis Chillemi, executive director of The Leukemia and Lymphoma Society of Westchester, helped brain-storm the event with Sleepy Hollow Physical Therapy's Richard Giordano. The pair met when Chillemi was receiving therapy after a shoulder operation.

"The genesis was very organic," Chillemi said. "I was talking about what I did, and after the fifth visit he (Giordano) said he wanted to do something for the community... From that conversation we had the first Sleepy Hollow Sprint Triathlon last year.

"We're very fortunate to be the benefactors," he added.

Individuals can register for $100 and teams can register for $150. Participants are then given their own mini-website to raise money from friends, family and co-workers. Minus overhead, all the money goes to the society for patient services and research.

This year, the triathlon has been moved forward by two weeks to try and gain more involvement from area high schools. Training clinics prior to the race are also being scheduled, along with food, music and general festivities for race day.

Last year, about 330 people registered and 280 people ended up participating. This year, organizers are expecting a larger turnout and are continuing to look for more volunteers and sponsors to make the triathlon a success.

"The more the better," Skrelja said. "It makes for a fun event and, of course, we raise money for a good cause."

To register, volunteer or become a sponsor, visit: http://sleepyhollowsprint.com