Interested in a challenge? This year the Maryland Masters Swim Team is sponsoring the USMS 2011 Check-Off Challenge. This is a postal event where participation is the goal: the challenge is to complete 18 pool events and one open water swim during the course of the calendar year. The events may be swum in practice or in meets at any time during the year. You can enter online or by mail; entry is $23 and you receive a cool t-shirt proclaiming your fortitude. Give it a try!