It isn't part of any effort to take control of the parks, as some have suggested doing. Instead, he characterizes it as a First Amendment-protected statement by citizens frustrated with the federal government.
Zion National Park and other parks and monuments around the state have been shuttered as part of the ongoing federal budget impasse. Park rangers have been issuing citations for trespassing to those ignoring the barriers in Grand Teton and Yellowstone national parks.
Urquhart and others plan to gather at 9 a.m. at the entry to the closed-down national park among the largest tourist attractions in the state and walk past the barriers blocking the road and into the park.
"I'm pretty frustrated. I think a lot of my constituents are pretty frustrated, and it just feels like increasingly the American people are the enemy of government," he said. "This is not intended to just be about the shutdown. It's about the federal government just being increasingly hostile to citizens. … There's plenty of blame to go around to both parties."
The senator, who invited about 400 people through Facebook, but says he doesn't know whether a lot or just a few will show up. "In either event," he said, "it should be enjoyable."