Each year thousands of runners, walkers, and bikers make their orbits around Lady Bird Lake—burning off indulgent calories, training for marathons, or trucking a younger generation around the trail for some fresh air and blue sky. This is merely routine for Austin’s active crowd, but their daily devotionals also serve as a fitting tribute to the former First Lady who spent much of her life beautifying Central Texas and promoting happy, healthy living.

Of course, Austin’s iconic wa...