As of September 22, 2025, the State-wide sound limit (including the US Forest Service's Sand Lake Recreation Area) is 96dBA.
In the US Forest Service managed Oregon Dunes National Recreation Area (ODNRA), the maximum sound limit is 93dBA.
Oregon State Parks sets the sound levels for ATVs which is based on each type of vehicle. Sound is measured at 20 inches from the tip of the muffler at a specific RPM for each individual vehicle. Most ATV Law Enforcement Officers throughout the State of Oregon have been issued a sound meter and are trained to conduct sound testing.
Excessively loud ATVs threatens trail access everywhere. Most ATVs equipped with a stocker muffler comply with sound limits. Some ATVs and motorcycles are designed for closed course completion and may not meet the Oregon sound limits. Most local shops can help you find a muffler that will bring your vehicle into compliance