(MD) (Nature Forward) Ever wanted to know what type of tree you were looking at and despaired because there were no leaves? Never fear, help is here! Join Habitat Manager Bradley Simpson for a winter stroll at Boundary Bridge in Rock Creek Park. On this walk, we’ll enjoy December along the creek and learn how to approach identifying trees when their branches are mostly bare. Trails are mostly flat and natural surface, which may be muddy and/or slippery.