Ranger-led walks occur daily in summer on the Pa'rus Trail. Meet the ranger at the Zion Canyon Visitor Center for an. Conducted daily from Memorial Day until September 29 and starting at the Zion Canyon Visitor Center. These tours last two hours. Seats are limited - make free reservations, in person, up to three days in advance at the information desk at the Zion Canyon Visitor Center. No telephone reservations accepted. Note: Because large groups can impact the availability of seats for other visitors, group size is limited to 8. This includes people sharing the same affiliation (school, club, scout troop, family, friends) on any one tour. 2 pm departure. Be prepared to walk 1.7 miles on an easy, paved trail with a 50 foot elevation gain (15 m). Wear appropriate footwear and bring a hat, sunglasses, sunscreen, and water. Wheelchairs may need assistance.