According to the NPS, "The Door Trail leads to the broken landscape that earned this area the name Badlands. Over time, water sliced through the earth around you, exposing sedimentary rock layers. These layers continue to erode today into dramatic canyons and spires. Explore these features up close by passing through a natural door at the end of the boardwalk."

Less than five minutes from the trailhead, there is a spur trail leading through a "door" in the rock formations, and you'll be welcomed by a viewing platform with impressive views to the East. According to this source, the pathway to the main viewing platform is also wheelchair and stroller friendly. Further ahead, the trail wanders deeper into the backcountry, always blazed with yellow, knee-high posts.

The trailhead for this hike is especially large, with plenty of parking for both trailers and larger RV's. Two other classic hikes, the Notch and Door Trails, also share the same trailhead. Should you have the time, a visit to all three is an awarding endeavor.

There is an entrance fee to access the park and current rates can be viewed here. As with most National Parks, dogs are also not allowed on any hiking trail in the park.

Sources: https://www.hikespeak.com/trails/door-trail-badlands/ https://www.hikespeak.com/trails/window-trail-badlands/