guided horseback riding trips, nature walks, and evening programs are available from late march to early november. the junior ranger program for ages 6–12 is active from memorial day to labor day at the zion nature center. rangers at the visitor centers in zion canyon and kolob canyons can help visitors plan their stay. a bookstore attached to the zion canyon visitor center offers books, maps, and souvenirs. the grotto in zion canyon, the visitor center, and the viewpoint at the end of kolob canyons road have the only designated picnic sites.