There aren't that many spots in the city where you can truly get muddy. That's why bikers, hikers and even birders cherish the miles of trail along the Trinity in L.B. Houston Park. Ignore the golf course and tennis courts and head straight into the woods. What you get is a shady (and after a rain, usually muddy) hike that twists and turns through trees, along the river bank and across open meadows. The route is flat, the trailhead is easy to find, and the path itself is often deserted. It's a surprising stretch of wilderness in the midst of urban sprawl.