Editor's Note, 16 October 2026: New page. Every park row below was read from that park's own National Park Service page on this date.
A national park generator is allowed only in set daily windows, usually two or three of two hours each, and it has to stay under 60 decibels on the A-weighted scale measured 50 feet away (36 CFR 2.12). The windows are not federal. Each park writes its own, and at 19 popular parks they run from none at all to 12 hours a day.
The table has the posted hours, the loops where a generator is banned outright, and the date of the page each row comes from.
Generator Hours at 19 National Parks
| Park and campground | Generator hours | Banned or limited |
|---|---|---|
| Acadia, Blackwoods and Seawall | 8 to 10 am and 4 to 7 pm | Blackwoods A Loop and Seawall C Loop only; banned in Blackwoods B Loop, Seawall A, B and D, Schoodic Woods and Duck Harbor; campsite must be occupied |
| Arches, Devils Garden | 8 to 10 am and 4 to 8 pm | Banned everywhere else in the park |
| Badlands, Cedar Pass | 8 am to 8 pm | Banned in Sage Creek Campground; must be "adequately muffled" |
| Big Bend, Chisos Basin | 8 to 11 am and 5 to 8 pm, designated areas | Banned at Cottonwood; idling vehicle engines count as generators |
| Big Bend, Rio Grande Village | 8 am to 8 pm, designated areas | Same page, same rules |
| Bryce Canyon | 8 to 10 am and 6 to 8 pm | Loops A and B only |
| Capitol Reef, Fruita | Two posted windows, 8 to 10 am with 5 to 7 pm or 6 to 8 pm | 1 March to 1 December: C Loop only. Rest of the year: Loops A and B |
| Death Valley | 7 am to 7 pm; Sunset 7 am to 9 pm | Banned at Texas Springs and Emigrant |
| Everglades, Long Pine Key | Not allowed 8 pm to 8 am | Banned in Loops I, J and K and in tent-only areas; must be attended |
| Glacier | 8 to 10 am, noon to 2 pm and 5 to 7 pm | Banned at Fish Creek C Loop, Many Glacier sites 48 to 59, 71 and 88 to 102, Rising Sun 49 to 84, all Sprague Creek, St. Mary A Loop, Two Medicine 1 to 36 and all Cut Bank |
| Great Smoky Mountains, Smokemont | Not allowed 8 pm to 8 am | Page says only that; check the loop map for generator-free areas |
| Joshua Tree | 7 to 9 am, noon to 2 pm and 5 to 7 pm | None listed |
| Mount Rainier | 8 to 10 am, noon to 2 pm and 5 to 7 pm | Banned in Loop E at Cougar Rock and Ohanapecosh |
| Rocky Mountain | "Generally" 7:30 to 10 am and 4 to 8:30 pm | Designated areas of auto campgrounds only |
| Sequoia and Kings Canyon | 9 am to 9 pm; Lodgepole and Dorst Creek 8 to 11 am and 5 to 8 pm | None listed |
| Shenandoah, Big Meadows | 8 to 10 am and 4 to 7 pm; to 9 pm for heat before 14 April and after 15 October | Banned in "generator-free" sites and group sites |
| Sleeping Bear Dunes, D.H. Day | 9 am to 6 pm | Sites 1 to 31 only; Loops 2 and 3 are generator-free |
| Yellowstone, Mammoth | 8 am to 8 pm, 60 dB limit | Banned at Indian Creek, Lewis Lake, Pebble Creek, Slough Creek and Tower Fall; the park's compendium bars them 8 pm to 8 am |
| Yosemite | 7 to 9 am, noon to 2 pm and 5 to 7 pm | None listed |
| Zion, South and Lava Point | 8 to 10 am and 6 to 8 pm | Banned at Watchman, except during power outages |
The Great Smoky Mountains page gives only the overnight ban. Check the date on the source before you plan around a row. Most were updated in 2026. The Bryce Canyon page was last updated in January 2022, though the park's 2026 compendium carries the same hours. The Sequoia and Kings Canyon page dates from January 2024.
Three Parks That Post No Hours
Grand Canyon, Grand Teton and Olympic were on our list, and we found no generator hours on the National Park Service pages for their main campgrounds. We aren't going to guess. Grand Canyon's Mather Campground links a seasonal bulletin dated 2016 that we couldn't read, so treat any hours you see quoted for it as unconfirmed.
If your park is on that list, ask before you go. Call the campground or ask at the entrance station: "Can I run a generator, and in what hours?"
What the 60 dB Limit Means in Practice
Every row above sits under one federal ceiling. The rule bans operating "motorized equipment or machinery such as an electric generating plant" above 60 dB(A) at 50 feet, and it also bans noise that is unreasonable for the place and time. Passing the number doesn't make a generator legal at 6 am next to a tent.
Most makers quote noise at 23 feet. Subtract about 6.7 dB to estimate the level at 50 feet in open air. Our campsite generator rules guide works through four models with that conversion, and the best quiet generators guide ranks the ones that stay well under the line.
How the Rules Differ Between Parks
Look at the table and three patterns jump out.
Windows are short. The most common pattern is two or three two-hour windows: morning, midday, evening. That gives you four to six hours of runtime a day at those parks, and that's what you should size a fuel plan around.
Loops differ inside one campground. Glacier, Acadia and Everglades ban generators in named loops or site ranges. Book the wrong loop and your generator stays on the roof rack.
The park wide rule may not be the campground rule. Arches bans generators everywhere except Devils Garden. Zion allows them at South and Lava Point but not Watchman.
If the Park Says No
Banned loops and short windows are why a battery power station is worth having. It makes no exhaust and no engine noise, so it can't break a generator rule, and it covers a phone, a laptop and lights for a weekend. Our best solar generators guide covers the ones worth carrying.
If your camper needs more than that, a quiet inverter model run inside the window is the answer. Start with the best camping generators or the full best generators hub, and size the load with the camp power calculator.
National Park Generator FAQ
Can you use a generator in a national park campground?
Yes, in most developed campgrounds, inside the posted hours and under 60 decibels at 50 feet. A few campgrounds ban generators outright, including Watchman in Zion, Sage Creek in Badlands and Cottonwood in Big Bend.
What hours can you run a generator in a national park?
It depends on the park. The most common pattern in our table is 8 to 10 am and 5 to 7 pm, sometimes with a midday window. Yosemite, Joshua Tree, Glacier and Mount Rainier all allow three two-hour windows. Death Valley allows 7 am to 7 pm. Yellowstone and Everglades only forbid 8 pm to 8 am.
Can you run a generator overnight in a national park?
No. Every park we checked either bans generators overnight or confines them to daytime windows, and quiet hours of 10 pm to 6 am are the norm.
Are generators allowed in the backcountry?
Not without a permit. Under 36 CFR 2.12, operating a portable motor or engine in a nondeveloped area of a national park needs one.
How do I check a park's current generator rules?
Open the campground's page on nps.gov and the park's superintendent's compendium, the document that lists each park's local rules. Both carry a "last updated" date. If the date is old or the page is silent, call the park.
