Lava Hot Springs to Hope, ID: Scenic Road Trip Guide

Starting in Lava Hot Springs, Idaho, and heading northeast to Hope, Idaho, this 320-mile route traverses the Snake River Plain and the Coeur d'Alene Mountains. The drive typically takes about 5 hours and 30 minutes without stops, but the journey is packed with geological wonders and small-town charm.

The route begins at an elevation of 5,000 feet and climbs over 6,000-foot passes, offering dramatic changes in landscape. You'll pass by the famous Craters of the Moon National Monument, a volcanic field that feels otherworldly.

Whether you're seeking hot springs, hiking trails, or just a peaceful drive through the Pacific Northwest, this road trip delivers. Here's how to make the most of it.

The route follows US-20 East to Idaho Falls, then US-26 East to Arco, and ID-75 North through Challis to Salmon. From Salmon, you'll take US-93 North to Missoula, Montana, then I-90 West to the Hope exit. For most of the journey, you'll be on well-maintained highways with occasional mountain sections.

• Total distance: 320 miles
• Driving time: 5 hours 30 minutes
• Best fuel stops: Idaho Falls (mile 50), Arco (mile 110), Salmon (mile 210), and Missoula (mile 280)
• Expect fuel prices to be 10-15% higher in remote towns like Arco and Salmon.

The route offers several rest areas and scenic pullouts. Be aware of limited cell service between Arco and Challis. The speed limit varies from 65 mph on highways to 45 mph in mountain curves.

Weather can change rapidly, especially in the mountains. Check road conditions before you go, especially in winter.

The Snake River Plain is a broad volcanic plain, shaped by ancient lava flows. Near Arco, you'll encounter Craters of the Moon, a vast ocean of basalt that is a designated National Monument and Preserve. This area is also home to a UNESCO World Heritage Site: the Yellowstone National Park, which is just a short detour from Idaho Falls.

As you climb into the Lost River Range, you'll see peaks over 12,000 feet, including Borah Peak, Idaho's highest point. The Salmon River, known as the 'River of No Return', runs through the Frank Church-River of No Return Wilderness, offering rafting opportunities.

Local commerce in towns like Arco and Challis centers on ranching and tourism. Try a local diner for a hearty meal, or pick up handcrafted goods at a roadside stand. The small towns preserve a distinct Western character, with historic saloons and general stores.

For a unique cultural experience, visit the Sacajawea Interpretive Center in Salmon, dedicated to the Lemhi Shoshone woman who guided Lewis and Clark.

Road quality is generally good, but be prepared for narrow shoulders and sharp curves in the mountains. Watch for wildlife, especially deer and elk, particularly around dawn and dusk. In winter, carry chains and be aware of avalanche zones.

For families, there are several kid-friendly stops. The Idaho Falls Zoo at Tautphaus Park is a great pit stop. Craters of the Moon offers junior ranger programs and lava tube explorations that kids love.

Pets are welcome at most outdoor attractions, but keep them on a leash. There are designated pet rest areas at rest stops. In towns, many motels and campgrounds are pet-friendly.

To manage fatigue, take breaks every 2 hours. Some notable rest zones include the Arco Rest Area and the Salmon River Scenic Overlook. If you need to stay overnight, consider Challis or Salmon, which offer a range of accommodations.

Hidden off-route spots include the hot springs at Goldbug, 20 miles from Salmon, and the ghost town of Custer, near Challis. For more tips on finding hidden gems, check out this guide on how to find the best stops and hidden gems between cities.