The South Loop roads in Yellowstone reopened this morning. So, the West Yellowstone, Cody East Gate and Teton/Jackson South Gate opened at 8 am today.
Entry will be based upon the last digit of your license plate:
The park has instituted an interim visitor access plan, coined the Alternating License Plate System (ALPS), to balance the demand for visitor access, park resource protection and economic interests of the local communities.
For public vehicle entry, it will not matter if the last numerical digit on the plate is odd or even. For all others, entrance will be granted based on the odd and even numbered days of the calendar month, so that odd-numbered ending license plates will be able to enter on odd days and vice versa for those ending in even numbers.
For vehicles with personalized license plates that only contain letters, entry will be granted along with odd-numbered ending plates. Vehicles with a combination of letters and numbers that end in a letter will be granted entry on even-numbered days.
Park officials have stated that under this new plan, entrance station staff will turn away vehicles that do not follow the odd-even structure.
There are some exceptions. For one, current commercial use operators with active commercial use permits can enter on any day, including those with commercial tours and stock groups. Commercial motor coaches will also be permitted to enter regardless of their license plate makeup.
Visitors who have proof of overnight reservations in the park’s hotels, campgrounds and backcountry reservations may also be permitted entry regardless of the day’s number status. Essential services such as mail, employees and contractors will be able to enter any day as well.
Regardless of license plates, motorcycle groups will only be permitted into the park on even days.