- The fine print
- 10 consecutive hours at interstate rest areas; 16 hours at US and state highway rest areas. No camping or plugging into outlets.
Parking overnight to sleep and camping are two different acts under most rules. Camping usually means setting up outside the vehicle: a tent, an awning, chairs, a fire. Staying inside a legally parked vehicle is often treated differently. Which one applies to you.
The posted sign and the officer on the ground beat this table. Rules change; the date above is when we last checked.
You can rest up to 10 consecutive hours at an Idaho interstate rest area, and up to 16 hours at rest areas on US and state highways. That is one of the more generous published limits in the country, and it comes straight from the Idaho Transportation Department.
What Idaho actually says
ITD’s rest areas FAQ, verified July 17, 2026, states it plainly: “Travelers may stop and rest from travel at rest areas for up to 10 consecutive hours on interstate rest areas and 16 hours on US and state highway rest areas.”
Two things to notice in that sentence. First, the limits differ by road type. The interstate rest areas, the ones you are most likely to use, carry the shorter 10-hour limit. The 16-hour window applies on US and state highway rest areas. Second, the word is consecutive. This is a limit on one continuous stop, and 10 hours covers a full night of sleep with time to spare.
Resting is not camping
Idaho’s rule is built around resting from travel, and ITD draws the line at camping. You can sleep in your vehicle within the time window. You cannot set up camp: no tent, no chairs and awning, no turning a parking space into a site. ITD also prohibits plugging into the rest area’s electrical outlets, so an RV looking for shore power is out of luck.
If you want to stay longer than a night, or actually camp, Idaho has a lot of national forest and BLM land where that is legal and free. See free camping in Idaho for where.
How to check locally
The 10 and 16-hour limits are the statewide policy, but the sign in front of you wins. If a specific rest area posts a different rule, follow the posted sign. For current closures and winter conditions, Idaho’s 511 service covers rest areas along with the roads.