Tourists in Arches National Park. Arches is one of five National Parks in Utah.
Utah.com lists the days in the coming year when entry to National Parks is free. Utah.com is a promotional site for Utah, where several National Parks are big tourist draws — so they have a bias.
It’s a good bias!
Alas, only four days so far:
FREE National Park Entrance Days 2018
January 15: Martin Luther King Jr. Day
April 1: First day of National Parks Week
September 22: National Public Lands Day
November 11: Veterans Day weekend
Four free days to split among five National Parks in Utah: Arches, Canyonlands, Zion Canyon, Bryce Canyon, and Capitol Reef. National Monuments are probably included in the free admission days, so you can add Timpanogos Cave, Rainbow Bridge, Dinosaur, Promontory Point and others.
There’s a lot to see in Utah’s mountains and redrock country — and that doesn’t include the Great Salt Lake and the Salt Flats.
Millard Fillmore's Bathtub 