UPDATED: Starting July 1, 2020, you will need a ticket to ride the park shuttle into Zion Canyon. The shuttle provides access along the Zion Canyon Scenic Drive. This is due to COVID-19 health restrictions, and is subject to re-evaluation by the Park at any time.
The Park Shuttle will run on the following weekends: February 13, 14, 20, 21, 27, 28, and March 6, and 7, 2021. Daily shuttle service will begin March 13, 2021 in both the park and Springdale. Shuttle service will operate daily until Fall.
The Scenic Drive is closed to private vehicles when shuttles are in service. Even without a shuttle ticket, you can recreate along and drive through the tunnel on the Zion-Mount Carmel Highway (State Route 9, vehicle size restrictions apply), drive the scenic Kolob Terrace Road to access additional hikes, and park and hike trails near the Zion Canyon Visitor Center, among other opportunities.
Zion National Park operates a free shuttle during the busier months of the year (typically March through November and during holidays) and no private vehicles are allowed into the Canyon. If you enter the Park from the South entrance (the Springdale side), you will pass a Visitor Center and campgrounds where you will find parking. The Visitor Center is stop #1 for the buses. If you enter the Park from the East entrance (the Mt. Carmel side), after you go through the tunnel and down the switchbacks, you will see a sign for Canyon Junction. Try to find parking at pullouts along the road here (between stops #2 and #3) or travel further down to the Visitor Center for parking.
You can hop on and off the buses as many times as you like. Here is a list of the stops:
#1 – Visitor Center (Pa’rus Trail, Archaeology Trail, Watchman Trail)
#2 – Museum
#3 – Canyon Junction
#4 – Court of the Patriarchs
#5 – Zion Lodge (Sand Bench Trail, Lower and Upper Emerald Pools Trails)
#6 – The Grotto (Kayenta Trail, Grotto Trail, Angel’s Landing)
#7 – Weeping Rock (Weeping Rock Trail, Hidden Canyon Trail, Observation Point)
#8 – Big Bend
#9 – Temple of Sinawava (Riverside Walk, the Narrows)
I recommend visiting the Park website, as trails are sometimes closed due to unsafe conditions, rockfalls, etc. https://www.nps.gov/zion/index.htm