Island Park to Kanarraville: Epic Utah Road Trip Guide

Driving from Island Park, Idaho, to Kanarraville, Utah, covers roughly 420 miles of varied terrain, from volcanic plateaus to red rock canyons. The route follows US-20 east to Idaho Falls, then I-15 south through the Salt Lake City metro area, ending on UT-59 near the mouth of Kanarra Canyon. Most drivers complete it in about 6 hours and 30 minutes without stops, but the journey offers enough geological and cultural diversity to stretch it into a full day.

One quirk of this drive: you cross the Continental Divide twice—once near Teton Pass in Idaho and again near Monida Pass on the Montana/Idaho border—though you never leave Idaho until well into Utah. The route also skirts the eastern edge of the Great Salt Lake, where the lake's shrinking shoreline has created expansive salt flats visible from I-15.

This guide covers everything from fuel costs and rest stops to hidden gems off the interstate, ensuring you make the most of this classic Western road trip. Whether you're seeking natural wonders, family-friendly attractions, or just a smooth drive, here's what you need to know.

The primary route uses US-20, I-15, and UT-59, all well-maintained highways. Expect heavy traffic around Idaho Falls and Salt Lake City, especially during rush hour. The drive is easily done in a day, but planning for fuel and rest stops is essential.

• Fuel stops are plentiful along I-15, with prices typically lower in Idaho than in Utah. Budget around $50-60 for a mid-size car.
• Rest areas are located every 50-70 miles, with clean facilities and picnic tables; most are open year-round.
• UT-59 from Cedar City to Kanarraville is a two-lane road with scenic views; watch for livestock and slow-moving farm vehicles.

The entire route is part of the U.S. National Highway System, ensuring consistent signage and emergency services. Cell coverage is generally good except for stretches in remote Idaho and the Utah desert. For navigation, a GPS app with offline maps is recommended.

For those who prefer a slower pace, consider breaking the drive with an overnight stay in Pocatello or Salt Lake City. Both cities offer a range of accommodations, from budget motels to boutique hotels. If you want to explore side attractions, plan extra days; this guide focuses on the direct drive.

The drive showcases a dramatic shift in geology and climate. Starting in Island Park, you're surrounded by the volcanic rhyolite of the Yellowstone Plateau, with evergreen forests and the Henrys Fork of the Snake River. As you head south, the landscape opens into the Snake River Plain, a basalt flood plain dotted with buttes and cinder cones. Near Idaho Falls, you'll see the famous greenbelt along the river, a popular spot for walking and cycling.

South of Pocatello, the terrain becomes more arid, transitioning into sagebrush steppe and eventually the red rock country of southern Utah. Kanarraville sits at the base of the Hurricane Cliffs, where sandstone canyons like Kanarra Creek offer stunning slot canyon hikes. This region is part of the Colorado Plateau, known for its dramatic erosion and vibrant hues.

Local commerce along the route is a mix of small-town diners, regional chains, and farm stands. In Idaho, try finger steaks, a local specialty, at a drive-in like the Big Jud's in Ashton or the Snakebite in Idaho Falls. In Utah, pasty shops in Cedar City and the historic Bit and Spur Restaurant in Springdale (if you detour to Zion) are noteworthy, though the latter is off the direct path.

For cultural stops, the LDS Temple in Idaho Falls and the Church History Museum in Salt Lake City offer insight into the region's religious heritage. Brigham Young University in Provo is also a quick detour if you want a campus tour.

Road conditions are generally good, but winter driving can be hazardous, especially in mountain passes like Monida Pass and the Canyons near Salt Lake. Check weather forecasts and carry chains if traveling between November and March. Speed limits are strictly enforced in Utah; radar detectors are legal in Idaho but illegal in Utah.

For families, the route offers several engaging stops. The Idaho Falls Zoo at Tautphaus Park is a small, manageable attraction. In Utah, Thanksgiving Point in Lehi features a museum of ancient life and a farm. For children interested in geology, the Utah Field House of Natural History in Vernal is a detour but worth it for dinosaur exhibits.

Fatigue management is crucial on long drives. Plan to stop every two hours or 100 miles. Top rest stops include the Rest Area at milepost 84 on I-15 near Blackfoot, which has a scenic overlook of the Snake River, and the Timber Lakes Rest Area near the Utah border, which offers water and vending machines.

Pet-friendly facilities are common; most rest areas have designated pet areas, and many hotels along the route accept pets for a nominal fee. Always keep your pet leashed and never leave them alone in a hot car.

Hidden gems include the Ghost Town of Cisco in Utah, just off I-70, which offers eerie ruins and photo opportunities. Also, the Crystal Hot Springs in Honeyville, Utah, provide a relaxing soak in natural geothermal pools.