Yellowstone National Park (WY)
Yellowstone: How to See the Park in Four Days Without Doing It Wrong
Yellowstone sits over a supervolcano caldera covering 3,468 square miles across Wyoming, Montana, and Idaho. It contains half the world’s geothermal features, the largest concentration of geysers on earth, and one of the best places in North America to see wolves, grizzly bears, and bison in the wild. It also gets 4-5 million visitors per year, which means that arriving without a plan, parking anywhere near Old Faithful in July, and expecting to spot wolves without knowing where to look are all reliable ways to miss what the park is actually about.
The Geothermal Features
Old Faithful erupts roughly every 90 minutes, sending around 14,000 litres of water 40-50 metres into the air for 90-120 seconds. The prediction board at the visitor centre gives the next eruption time within a 10-minute window. The viewing boardwalk fills 15 minutes before the predicted eruption time. The adjacent Old Faithful Inn is worth seeing for its seven-storey log lobby regardless of whether you eat there.
Grand Prismatic Spring in the Midway Geyser Basin is the more visually extraordinary site. The spring is 91 metres wide and shifts from deep blue at the centre through green and yellow to orange at the bacterial mats at the edge; the colours are created by heat-adapted bacteria at different temperature zones. The boardwalk gives a partial view; the full overhead perspective requires the 0.7-mile Fairy Falls trailhead 1.5km south of the Midway parking area, which climbs to a ridge for the classic photograph.
Norris Geyser Basin, north of Madison Junction, is less visited than the Old Faithful area and contains Steamboat Geyser, the tallest active geyser in the world (eruptions reach 90 metres but occur unpredictably, from days to years apart). Even without a Steamboat eruption, the Norris basin has the most geologically active and visually varied terrain in the park.
Wildlife: Lamar Valley
Lamar Valley in the northeast corner of the park is the correct place to look for wolves and bears. The Lamar Canyon Pack has been the most reliably visible wolf pack in Yellowstone for years. Dawn and dusk are the standard viewing windows; park on the pullouts along the Lamar Valley road and scan the slopes with binoculars. The valley also holds year-round bison herds, pronghorn antelope, and seasonal grizzly bear activity near Slough Creek.
The Hayden Valley, mid-park between Yellowstone Lake and Canyon Village, has bison in very large numbers and frequent bear sightings in spring and early summer when grizzlies are feeding on bison calves.
Logistics
Entry costs USD 35 per vehicle (7-day pass). An America the Beautiful annual pass at USD 80 covers all national park entrances and pays for itself on this trip alone if combined with Grand Teton.
The park has five entrance gates; most visitors from the south enter through the South Entrance on Highway 89 from Jackson. From Salt Lake City, the East Entrance via Cody (US-14/16/20) is the longer drive but enters the park through the Absaroka Range and gives a different first impression.
In-park lodges (Old Faithful Inn, Lake Hotel, Canyon Lodge) book out 12+ months in advance for summer. Staying in West Yellowstone (Montana) or Gardiner (Montana, north entrance) is easier to book. The nearest commercial airport with direct routes from major US cities is Jackson Hole (JAC), 60 miles south.
September is the best month: summer crowds have thinned, temperatures are reasonable, and the elk rut begins in late September, when bull elk bugle at dawn and dusk along the Madison and Gibbon rivers.