The 2010 triathlon season in Philadelphia is brief with many events and races selling out already. A few of Pennsylvania's few triathlons and endurance events are still accepting registrations, which will likely sell out in the next week or possibly by the time you finish reading this piece.

Below are a few Pennsylvania triathlons and endurance races still accepting registrations.

• Philadelphia Stairclimb - March 20th at The Bell Atlantic Tower. This is a speed stair climb right on 1717 Arch Street in Center City Philadelphia. Money raised benefits the American Lung Association.
• Indian Valley Y Youth Triathlon - May 2nd at the Indian Valley YMCA in Harleysville. This is a kids race.
• DiamondGirl Triathlon - June 13th. Women's only race out in Quakertown at Lake Nockamixon State Park.
• Philadelphia Triathlon - June 25-27th. 2010 marks the 6th annual Philly Triathlon. Last year's results can be found here.
• SheROX Philadelphia Triathlon - August 1st. In its 4th year, a women's only race which takes place in Fairmount Park. Last year, Rebeccah Wassner took the title.

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