What a campground's maximum vehicle length means

2,534 of the 5,569 campgrounds on this site show a maximum vehicle length. The other 3,035 do not, because the number comes from Recreation.gov's site-level records and only campgrounds with those records carry it. A missing length does not mean a campground takes no RV. It means the agency did not publish a length.

Where the number comes from

Recreation.gov stores a "Max Vehicle Length" attribute on individual campsites. This site reads every site at a campground and keeps the largest value, so the length on the campground page is the longest vehicle any single site at that campground permits. Most sites at the campground are shorter than that number. A campground listed at 40 feet may have one 40-foot site and thirty sites at 25.

The big rigs list applies this rule with a threshold of 40 feet. 1,852 campgrounds qualify, which is 73 percent of the campgrounds that publish a length at all. The median published maximum is 46 feet, and 295 campgrounds publish a maximum under 30 feet.

What the length measures

Recreation.gov's attribute is a single number in feet, and the agency that entered it decided what it measured. In practice it is usually the length of the driveway or parking spur. It may or may not account for a tow vehicle. Agencies do not record that choice in the data, so this site cannot tell you whether a 35-foot limit means a 35-foot trailer or a 35-foot truck-and-trailer combination. When the campground's own text addresses the question, that text appears on the campground page under "Know before you go".

Trailers complicate the comparison. A 30-foot travel trailer behind a 20-foot truck occupies 50 feet of driveway if the truck stays hitched. Unhitching and parking the truck beside the trailer changes the arithmetic, and whether that is allowed is a campground rule you confirm with the campground.

Reading the site guide

Campground pages with site-level records include a site guide. Each row is one site, taken from Recreation.gov. The columns depend on what the agency filled in. The column headed "Fits, ft" shows the site's maximum vehicle length when one was recorded, and falls back to the recorded driveway length when it was not. Other columns show the entry type, such as pull-through or back-in, the driveway surface, shade, power, water and sewer, and whether the agency marked the site accessible. 2,630 campgrounds have at least one site with a recorded length, and 93,593 sites carry one across the site's records.

The filters above the table narrow the rows. The "40 ft and up" filter keeps sites whose recorded length is 40 feet or more. The "Pull-through" filter keeps sites the agency marked pull-through. When a filter would keep every row or no row it does not appear, because it would not tell you anything.

Using the fit tool

The fit tool takes your rig's dimensions and counts the sites at each campground that meet them. For a towed setup it gives two counts. One is the sites that take the trailer alone, and the other is the sites that take the truck and trailer together. The two counts exist because the data does not say which one the agency measured, so you see both readings and decide.

Before you commit

The site guide and the fit tool are read from the agency's data. They are not a survey of the campground. Tight turns and low branches on the approach road do not appear in the length field. Call the campground or the managing office for anything the record does not say, and treat a published length as the upper bound for the longest site there. The guide to RV length limits on this site goes further into how agencies measure, and the electric hookups list and full hookups list narrow the same campgrounds by what the sites supply.