National Park RV Length Limits: Every Posted Campground Limit

National park RV length limits decide whether your rig can camp inside a park at all. Many park campgrounds were built for smaller vehicles, with tight loops, short sites and low branches. As a result, a reservation is no guarantee that a long motorhome or fifth wheel will fit, and national park RV camping starts with checking the limit. This guide lists every National Park Service campground that publishes an RV length limit, sorted by region, using the Park Service’s own data.

Last reviewed and updated: September 30, 2026. Written by Jeremy Jarvis.

National park RV length limits at a glance

We pulled all 665 campgrounds in the National Park Service API on September 30, 2026. Of those, 181 publish a maximum RV length and 149 publish a maximum trailer length. The rest do not list a single limit, usually because site sizes vary within the campground. Among campgrounds with a posted RV limit, the median is 35 feet.

In other words, a rig of 25 feet or less fits almost every campground that posts a limit, while a 40-foot coach fits only a minority. Therefore, the bigger your RV, the earlier you need to plan national park RV camping. National park RV length limits also change, so recheck before each trip.

Why national park campgrounds set RV length limits

Park campgrounds often date from an era of smaller vehicles. Roads inside the loops can be narrow, with sharp turns and trees close to the pavement. Sites may be short back-ins rather than pull-throughs. Consequently, a posted limit is the park’s way of saying which rigs can reach and use a site safely. Arriving with a longer rig can mean being turned away at the entrance or the site, even with a paid reservation.

Limits also protect the park. Oversized vehicles that cut corners damage vegetation, road edges and utilities. That is why rangers take national park RV length limits seriously, and why national park RV camping in a long rig needs a plan.

How to measure your RV for park campground length limits

Most people underestimate their length. Model names rarely match true overall length, so measure it yourself.

1. Motorhomes: measure from the front bumper to the rear bumper, including ladders, bike racks, spare tires and any rear hitch.
2. Towed cars: note the car separately. Some campgrounds want the car parked alongside rather than behind, and some parks limit combined length.
3. Trailers and fifth wheels: measure from the coupler or kingpin to the rear bumper, then note the tow vehicle length.
4. Round up: if you measure 31 feet 4 inches, treat your rig as 32 feet.

Our free RV Campground Finder lets you enter this number and filter national park campgrounds by state, so you only see sites that post a limit your rig fits.

National park RV length limits by region

Below is a region-by-region summary built from the same data. For the complete list of every campground and its posted limit, with links to each official page, see our national park RV length limits table. Limits are shown exactly as published in NPS data on September 30, 2026.

National park RV length limits in California

In California, 46 park campgrounds across 10 park units post an RV length limit. Posted limits run from 20 to 90 feet. The longest is at Pinnacles Campground in Pinnacles National Park (90 feet). Next come Sentinel Campground in Sequoia & Kings Canyon National Parks (82 feet) and Sunset Campground in Death Valley National Park (60 feet). However, Mid Hills Campground in Mojave National Preserve (20 feet) posts one of the shortest limits here. Smaller rigs therefore have the most choice in this region.

National park RV length limits in Oregon, Washington, Alaska and Hawaii

In Oregon, Washington, Alaska and Hawaii, 22 park campgrounds across 8 park units post an RV length limit. Posted limits run from 20 to 50 feet. The longest is at Mazama Campground in Crater Lake National Park (50 feet). Next come Newhalem Creek Campground in North Cascades National Park (50 feet) and Kettle Falls Campground in Lake Roosevelt National Recreation Area (50 feet). However, Goodell Creek Campground in North Cascades National Park (20 feet) posts one of the shortest limits here. Smaller rigs therefore have the most choice in this region.

National park RV length limits in Utah and Arizona

In Utah and Arizona, 18 park campgrounds across 10 park units post an RV length limit. Posted limits run from 15 to 70 feet. The longest is at Wahweap Campground & RV Park in Glen Canyon National Recreation Area (70 feet). Next come Halls Crossing RV & Campground in Glen Canyon National Recreation Area (60 feet) and Trailer Village RV Park – South Rim in Grand Canyon National Park (50 feet). However, Rainbow Park Campground in Dinosaur National Monument (15 feet) posts one of the shortest limits here. Smaller rigs therefore have the most choice in this region.

National park RV length limits in Nevada, New Mexico, Texas and Oklahoma

In Nevada, New Mexico, Texas and Oklahoma, 17 park campgrounds across 10 park units post an RV length limit. Posted limits run from 24 to 50 feet. The longest is at Pine Springs Campground in Guadalupe Mountains National Park (50 feet). Next come Baker Creek Campground in Great Basin National Park (50 feet) and Bird Island Basin Campground in Padre Island National Seashore (45 feet). However, Wheeler Peak Campground in Great Basin National Park (24 feet) posts one of the shortest limits here. Smaller rigs therefore have the most choice in this region.

National park RV length limits in Colorado and Wyoming

In Colorado and Wyoming, 24 park campgrounds across 10 park units post an RV length limit. Posted limits run from 22 to 55 feet. The longest is at South Rim Campground in Black Canyon Of The Gunnison National Park (55 feet). Next come Elk Creek Campground in Curecanti National Recreation Area (55 feet) and Lake Fork Campground in Curecanti National Recreation Area (55 feet). However, Red Creek Campground in Curecanti National Recreation Area (22 feet) posts one of the shortest limits here. Smaller rigs therefore have the most choice in this region.

National park RV length limits in Montana, Idaho and the Great Plains

In Montana, Idaho and the Great Plains, 10 park campgrounds across 4 park units post an RV length limit. Posted limits run from 18 to 40 feet. The longest is at Apgar Campground in Glacier National Park (40 feet). Next come Elk Mountain Campground in Wind Cave National Park (40 feet) and St. Mary Campground in Glacier National Park (40 feet). However, Sage Creek Campground in Badlands National Park (18 feet) posts one of the shortest limits here. Smaller rigs therefore have the most choice in this region.

National park RV length limits in the Midwest

In the Midwest, 5 park campgrounds across 2 park units post an RV length limit. Posted limits run from 35 to 40 feet. The longest is at Platte River Campground in Sleeping Bear Dunes National Lakeshore (40 feet). Next come Little Beaver Lake Campground in Pictured Rocks National Lakeshore (36 feet) and Twelvemile Beach Campground in Pictured Rocks National Lakeshore (36 feet). However, D. H. Day Campground in Sleeping Bear Dunes National Lakeshore (35 feet) posts one of the shortest limits here. Smaller rigs therefore have the most choice in this region.

National park RV length limits in the South and Southeast

In the South and Southeast, 27 park campgrounds across 10 park units post an RV length limit. Posted limits run from 24 to 60 feet. The longest is at Gulpha Gorge Campground in Hot Springs National Park (60 feet). Next come Rocky Springs Campground, Milepost 54.8 in Natchez Trace Parkway (55 feet) and Meriwether Lewis Campground, Milepost 385.9 in Natchez Trace Parkway (55 feet). However, Balsam Mountain Campground in Great Smoky Mountains National Park (24 feet) posts one of the shortest limits here. Smaller rigs therefore have the most choice in this region.

National park RV length limits in the Mid-Atlantic and Northeast

In the Mid-Atlantic and Northeast, 12 park campgrounds across 7 park units post an RV length limit. Posted limits run from 20 to 45 feet. The longest is at Oceanside Drive-in Campground in Assateague Island National Seashore (45 feet). Next come Bayside Drive-in Campground in Assateague Island National Seashore (45 feet) and Horse camping in Assateague Island National Seashore (45 feet). However, Seawall Campground in Acadia National Park (20 feet) posts one of the shortest limits here. Smaller rigs therefore have the most choice in this region.

Trailer limits vs RV limits in park campgrounds

Many park campgrounds post two numbers: a maximum RV length and a maximum trailer length. They are not always the same. In fact, the trailer limit is often shorter, because a trailer plus its tow vehicle needs more room to turn and park than a motorhome of the same length. So if you tow, check the trailer figure first.

Also, pay attention to how each park defines length. Some count only the trailer. Others count the whole combination of truck and trailer. When a campground page is unclear, call and ask. Give the ranger both numbers, and ask whether your combination fits the specific loop you plan to book.

Towed cars follow similar logic. A motorhome that fits a site may still leave no room for a towed car. For that reason, many parks ask you to unhook and park the car in a separate spot or an overflow lot.

Seasons, closures and changing limits

National park RV length limits are not fixed forever. Parks rebuild loops, close sites for tree hazards and change rules after road work. In addition, many campgrounds in mountain and northern parks close for winter, while desert parks are busiest in the cooler months. Therefore, treat any list, including this one, as a starting point. Always confirm the current limit, season and closures on the park’s own website before you travel.

National park RV camping with a big rig

If your rig is 36 feet or longer, national park RV camping takes extra planning. However, it is far from impossible. These strategies help.

• Target the right campgrounds. Use the tables above to shortlist campgrounds that post limits above your length, then check individual sites on Recreation.gov.
• Book early. The few long sites in popular parks are often the first to go. Many park campgrounds release reservations on Recreation.gov months ahead.
• Stay just outside the park. National forest, BLM and Army Corps of Engineers campgrounds near park boundaries often have longer sites. Our guide to free camping explains where dispersed camping is allowed on public land.
• Use gateway towns. Private RV parks in gateway towns usually handle big rigs and offer full hookups.
• Explore in a smaller vehicle. Park the RV and drive a towed car or truck on narrow scenic roads, which may have their own vehicle length limits.

Booking tips for national park RV camping

Once you know your rig fits, the next challenge is getting a site. Here is a simple process that works for most parks.

1. Check the campground’s own page for the posted limit, season and generator hours.
2. Look up individual site lengths on Recreation.gov, because the campground limit is usually the longest site, not every site.
3. Note whether sites are back-in or pull-through, and check the driveway slope if you have a long trailer.
4. Book as early as the park allows, and keep a backup campground outside the park.
5. Call the park if anything is unclear. Rangers would rather answer a question than turn you away.

Other road limits inside national parks

Campground limits are only part of the picture. Some scenic roads inside parks also restrict vehicle length, height or width, and some close to large vehicles entirely. For example, well-known mountain roads and tunnels in several western parks have vehicle size restrictions. Therefore, check the park’s road and driving pages as well as its campground pages, and plan to explore narrow roads in a smaller vehicle or on a park shuttle where one runs.

Quick checklist before you drive into a park

Run through this short list the week before any national park RV camping trip. It takes a few minutes and prevents most arrival-day surprises.

• Confirm your measured length, including racks and hitches.
• Match it against the campground and the specific site you booked.
• Check scenic road and tunnel restrictions on your route inside the park.
• Note generator hours, check-in times and whether the loop is back-in only.
• Save a backup campground outside the park in case your site does not work.

How we built this national park RV camping list

We pulled the full campground dataset from the National Park Service API and kept every campground that publishes a maximum RV length. We did not edit the limits, so any error in the source data appears here too. We refresh the data regularly, and you can always check the latest figures with our campground finder. To budget the whole trip, including fuel and campground fees, try the RV Trip Cost Calculator, and browse the Campgrounds & Routes hub for more planning guides.

Park-by-park guides to national park RV length limits

Each of our park guides lists campgrounds, booking windows and the length limits that apply to RVs, built from official National Park Service records. Use them alongside this overview when you plan a specific trip.

• Yellowstone campgrounds for RVs
• Grand Teton campgrounds
• Grand Canyon campgrounds
• Zion campgrounds
• Camping in the Smoky Mountains
• Hoh Rainforest campground in Olympic National Park
• Sleeping Bear Dunes camping

In addition, the Seasonal RV Route Planning Checklist helps you time park visits around weather, closures and booking windows.

Frequently asked questions about national park RV length limits

What is the maximum RV length for national park campgrounds?

There is no single limit. In National Park Service data pulled on September 30, 2026, the posted RV limits range widely by campground, and the median posted limit is 35 feet. Check each campground’s own limit before you book.

Can a 40-foot RV camp in national parks?

Yes, in some campgrounds, but far fewer than for smaller rigs. Many park campgrounds post limits under 40 feet, so a big rig often needs a specific campground, a specific loop, or a private or public campground just outside the park.

How do I measure my RV for a campground length limit?

Measure the full length from front bumper to rear bumper, including ladders, racks and hitches. For trailers, measure from the coupler to the rear bumper and note the tow vehicle separately, because some parks limit combined length.

What if a national park campground does not list a length limit?

It does not mean every rig fits. Many campgrounds simply do not publish one figure because sites vary. Check site details on Recreation.gov or call the park before you arrive with a large RV.

Where can big rigs stay near national parks?

Look at national forest, BLM and Army Corps of Engineers campgrounds nearby, gateway-town RV parks, and dispersed camping on public land where allowed. Our free campground finder lists federal campgrounds by state.

Sources and how we researched this guide

This guide is built from official data. The campground list and length limits come from the National Park Service API, pulled on September 30, 2026, and we did not visit these campgrounds. Parks change limits, close loops and update data on their own schedules, so confirm with the park before you travel. Found something out of date? Tell us and we will check it against the source.

• National Park Service: developer API and data
• National Park Service: campgrounds
• Recreation.gov: reserve national park campsites
• Yellowstone National Park: campgrounds

Keep planning

• RV Trailer Hitch Guide: Hitch Classes, Tongue Weight and Weight Distribution
• RV Tire Pressure Monitoring System Guide: How RV TPMS Works and How to Set It Up
• Grand Canyon Campgrounds for RVs: Mather, Desert View, and Current Water Restrictions
• Zion Campgrounds for RVs: Watchman, South, and the Large-Vehicle Rules

Go deeper: Campgrounds & Routes hub · RV Campground Finder and Length Checker · RV Trip Cost Calculator