Lower Body Stretch - hips, quads & hammies.
I like all the pictures this guy has on his yoga site More
Hip Flexor and Quad Stretch http://www.bicycling.com/training/health-injuries/5-stretches-that-will-make-your-knee-pain-go-away/slide/3
5 Moves to Stretch Out Your Quads
The pose: Reclined Half-Pigeon with Quad Stretch http://www.womenshealthmag.com/fitness/yoga-poses-to-open-hip-flexors/slide/4
3 Ways to Get a Good Quad Stretch: Stretch Your Quad Muscles with the Hip Bridge
Show your hardworking legs some love.
Hike Up Your Workout with This Trail-Ready Training Plan