On Forest Service roads and single track in surrounding National Forests, you can get off paved roads to the north, south, east, and west of Estes Park & RMNP.
Roosevelt & Arapaho National Forest Service roads are the best bet for your 4 wheeler or ATV, and you’ll have access to miles of trails to explore.
It’s also helpful to be aware of Rocky Mountain National Park’s position on the noise produced by ATVs:
“Park soundscapes are part of a web of natural and cultural resources protected by the National Park Service (NPS). The acoustic environment is a resource that NPS protects, just like air or water. Parks are actively working to minimize noise pollution from many sources, both internal and external. Noise can adversely impact wildlife by reducing the area over which they can communicate and listen for potential prey or predators. Natural sounds are also important to park visitors, 90 percent of whom say enjoying the sounds of nature is one of the top reasons they visit parks.”