Most National Park campgrounds can fit an RV of 25 to 35 feet, but limits vary a lot from one campground to the next, and even from site to site within the same campground. A handful of campgrounds take rigs of 40 feet or more, while others top out around 20 feet or don’t allow trailers at all.
This guide lists the posted RV and trailer length limits for campgrounds in 37 popular National Park Service sites, along with hookups, dump stations and how to book. Use it to narrow down your options, then confirm the details for your specific site before you reserve.
Quick answer: If your RV (or trailer plus tow vehicle) is under 30 feet, you’ll fit in most National Park campgrounds that allow RVs. Between 30 and 40 feet, your choices shrink and you’ll need to book the specific sites that fit. Over 40 feet, look at the few campgrounds listed below with higher limits, or stay at a private RV park outside the park.
How We Put This Guide Together
The length limits, hookup and dump station details below come from the National Park Service’s own campground listings (the NPS data system that powers each park’s “Campgrounds” page). We last checked them in September 2026 and noted campgrounds that were closed at the time.
A few things to keep in mind when reading the tables:
“Not listed” means the Park Service doesn’t publish a length for that campground. It doesn’t mean there is no limit. Call the park or check the reservation page.
Limits are the longest sites. Many campgrounds have only a few sites that fit the maximum length, and those book up first.
Limits change. Campgrounds get renovated, sites get re-graded, and closures happen. Always check the park’s website before you go.
What Counts Toward the Length Limit?
This is where many RVers get caught out. How the limit is measured depends on what you’re driving:
Motorhomes: the limit applies to the motorhome itself, bumper to bumper, including anything mounted on the back such as a bike rack or cargo carrier.
Travel trailers and fifth wheels: the posted trailer length usually refers to the trailer alone, but the site still has to fit your tow vehicle. Some campgrounds post a single combined length instead, so read the campground page carefully.
Towed cars: if you tow a car behind a motorhome, plan to unhook it and park it in the site or in overflow parking where allowed.
Separate RV and trailer limits are common because trailers need more room to back in and turn. That’s why you’ll see many campgrounds below with a lower limit for trailers than for motorhomes.
How to Measure Your RV or Trailer
Start with the length listed in your owner’s manual or the manufacturer’s spec sheet, then measure it yourself with a tape measure. Manufacturer lengths often leave out the hitch, spare tire, ladder or rear-mounted gear.
Motorhome: measure from the front bumper to the farthest point at the back.
Trailer: measure from the tip of the hitch coupler to the rear bumper.
Fifth wheel: measure from the front of the pin box (the cap) to the rear bumper.
Write the number down and keep it handy. Reservation sites like Recreation.gov ask for it when you book, and some sites are filtered out if your rig is too long.
Size, Width and License Rules Beyond the Campground
Length limits aren’t the only thing to plan for. Some park roads also restrict vehicle size. Examples include parts of Going-to-the-Sun Road in Glacier and the tunnels on the Zion–Mount Carmel Highway, where larger vehicles need an escort permit. Check each park’s “Driving” or “Directions” page for road restrictions.
On most major U.S. highways, the federal width limit is 102 inches (8.5 feet), and most RVs are built to that width. For licensing, most states don’t require a special license for a personal RV. A few do require one for very heavy rigs, often those over 26,000 pounds. See our state-by-state RV license guide for details.
RV Length Limits by National Park Campground
Parks are listed alphabetically. Only campgrounds that allow RVs or trailers are included. Tent-only, group, horse and backcountry sites are left out.
9. Chaco Culture National Historical Park (New Mexico)
Campground
Max RV length
Max trailer length
Electric hookups
Dump station
Booking
Gallo Campground
42 ft
20 ft
No
No
Reservations + some first-come sites
Chaco is a National Historical Park rather than a National Park, but it’s a popular stop on Southwest RV trips, so we’ve kept it on the list. The dirt access roads can be rough, especially after rain.
Note: the North Rim campground isn’t listed here. The 2025 Dragon Bravo Fire caused major damage on the North Rim, so check the park website for its current status. Trailer Village is the only in-park option with full hookups.
Heads up: Norris Campground: Closed until further notice. Pebble Creek Campground: Closed until further notice (2022 flood recovery).
Yellowstone’s campgrounds are run by a concessioner (Yellowstone National Park Lodges), and the Park Service doesn’t list lengths for most of them. Fishing Bridge RV Park is the only campground with full hookups, and it is hard-sided RVs only.
Book as early as you can. Most reservable National Park campgrounds open bookings on Recreation.gov up to six months ahead, and the longest sites go first.
Filter by length when you book. Enter your real length on Recreation.gov so it only shows sites that fit.
Call the campground if you’re close to the limit. Rangers and camp hosts know which sites are easiest to back into and which have low branches or tight turns.
Have a backup outside the park. Private RV parks and nearby National Forest campgrounds often take bigger rigs and offer full hookups.
Plan for dry camping. Most National Park campgrounds have no hookups. Arrive with full fresh water and empty tanks, and find the nearest dump station ahead of time.
Do National Parks Allow Class A Motorhomes and Fifth Wheels?
Yes, many do, but your options are more limited. Class A motorhomes often run 30 to 45 feet, and fifth wheels are among the longest towables. From the tables above, campgrounds that list limits of 45 feet or more include Gros Ventre, Colter Bay and Headwaters (Grand Teton), Trailer Village (Grand Canyon), Morefield (Mesa Verde), Newhalem Creek (North Cascades), South Rim (Black Canyon of the Gunnison), Pine Springs (Guadalupe Mountains), Sunset (Death Valley), and Mazama (Crater Lake, for motorhomes).
If you’re still choosing a rig and plan to visit many parks, a shorter RV gives you far more choices. Our roundup of the best small motorhomes can help you find one.
Frequently Asked Questions
What is the maximum RV length allowed in National Parks?
There’s no single limit across the park system. Each campground sets its own. In the campgrounds listed here, most posted limits fall between 25 and 40 feet, and a few go higher.
Do National Park campgrounds have hookups?
Most don’t. Only a minority of National Park campgrounds offer electric hookups, and full hookups (water, sewer and electric) are rare. Examples include Trailer Village at the Grand Canyon, Fishing Bridge RV Park in Yellowstone and Colter Bay RV Park in Grand Teton.
Is the trailer length limit the same as the combined length?
Not always. Most National Park listings give the trailer length alone, but some campgrounds post a combined limit for trailer plus tow vehicle. Check the campground page. If it isn’t clear, call the park.
Where can I stay if my RV is too long?
Look for private RV parks, KOA campgrounds, state parks, or National Forest and BLM campgrounds near the park entrance. Many are within a short drive of the main sights and are built for larger rigs.
Aaron Richardson is the co-founder of RVing Know How. He and his wife, Evelyn, have been traveling in their RV with their dog, Skye, since July 2017, exploring the U.S. and crossing into Mexico along the way.
Before life on the road, Aaron worked in marketing for a Fortune 500 company. Today he works remotely as a content creator and marketing strategist.
Aaron and Evelyn started RVing Know How after running into RV mishaps they later realized could have been avoided with better planning. The site grew out of the checklists and notes they built along the way. Aaron writes practical, beginner-friendly guides on buying, maintaining and living in an RV.
