You don't need hiking boots to see the best of Yellowstone. The park's Grand Loop Road, a 142-mile figure-eight route accessible from every entrance, puts you within walking distance of geysers, hot springs, waterfalls and wildlife — and it ranks among the longest scenic drives in any US national park, outpacing the famous roads of Death Valley and Glacier.

Technically you could drive the whole loop in a day, but that would rush it. Summer traffic, bison jams and sheer volume of sights make two days a smarter minimum. Note the timing catch: sections of the road close to private vehicles from October through May. Winter visits are spectacular, but you'll need a snowmobile or snowcoach tour rather than your own car.

Start in the park's northwest at Mammoth Hot Springs, where hot water has built an irregular staircase of travertine terraces, with boardwalks running above the cascading pools. It's a natural overnight stop — the Mammoth Hot Springs Hotel & Cabins and Mammoth Campground are both right there.

Heading south toward Old Faithful, the road climbs through Golden Gate Canyon and passes the Norris Geyser Basin Museum, a good primer on the park's hydrothermal geology, surrounded by geysers and bubbling mud pots. The Artists Paintpots add more steaming, colourful pools, but the showstopper is Grand Prismatic Spring, documented by travellers since the mid-1800s. Take the Midway Geyser Basin Trail boardwalk to see its blue-to-orange palette up close; Madison Campground is the handy overnight option nearby.

A slight detour off the loop brings you to Old Faithful itself, erupting roughly every 90 minutes. It's far from the only act in town — boardwalks lead to Morning Glory Pool, Crested Pool and Castle Geyser, which blows its top about every 14 hours. Three lodgings (Old Faithful Inn, Lodge and Snow Lodge) make this area easy to base yourself in.

Finish with the Grand Canyon of the Yellowstone River. North Rim Drive leads to a paved trail and platform at the Brink of Lower Falls, where water thunders over a 308-foot drop — you'll hear it before you see it. South Rim Drive gets you the Upper Falls View for the canyon's 109-foot falls.

Why it matters: Grand Loop Road is the perfect fit for road-trippers, families with mixed mobility, or anyone short on time who still wants Yellowstone's headline sights without committing to long backcountry hikes. It turns the park into a choose-your-own itinerary — sample it in a long day or string together two or three nights with stops at the lodges and campgrounds along the way. Just book accommodation early for summer, keep to the boardwalks around thermal features, and build in buffer time for the traffic of both the four-wheeled and four-legged variety.