Photo by Martin Locraft.

Sunday’s weather forecast? Sunny, but only with a high of 38 and winds gusting at 19 miles per hour. Not that the cold will stop a bunch of dedicated people from stripping down to their skivvies outside: the 2011 No Pants Metro Ride will take place this Sunday, the fourth year that a large group of Washingtonians will head to a local park, take off their pants, then hit the Metro system and pretend like they aren’t half-naked.

The event, adapted from the New York-originated tradition, first hit D.C. in 2008, and has grown in participants each year. This Sunday’s event currently has a whopping 876 people planning to attend. Organizers from Capitol Improv are telling those interested in blanketing the subterranean with pantsless people to meet in Hancock Park — note: people must wear pants to the meeting spot — bordered by C and 7th Streets SW. From there, the group will de-pant as a group and take to L’Enfant Plaza.

Can’t wait for Sunday? Feel free to relive the 2008, 2009 and 2010 iterations of the Ride.