Idaho Falls to Bonners Ferry Road Trip Guide

Did you know that the route from Idaho Falls to Bonners Ferry roughly follows the path of the historic Mullan Road, a military wagon road built in the 1850s by Lieutenant John Mullan? This 360-mile journey on US-20, I-15, and US-95 traverses the volcanic Snake River Plain, the rugged Bitterroot Range, and the lush Panhandle forests. The drive typically takes about 5 hours 45 minutes without stops, but we recommend at least two days to fully appreciate the diversity.

This guide answers common questions like best stops Idaho Falls, ID to Bonners Ferry, ID, how long to drive Idaho Falls, ID to Bonners Ferry, ID, and is it worth driving Idaho Falls, ID to Bonners Ferry, ID? We also detail things to do between Idaho Falls, ID and Bonners Ferry, ID.

The route from Idaho Falls to Bonners Ferry consists of three distinct highway segments. From Idaho Falls, take US-20 west to I-15 north near Dubois. Then follow I-15 to the junction with US-95 near Coeur d'Alene, then take US-95 north to Bonners Ferry.

• Segment 1: Idaho Falls to Dubois (US-20) - 50 miles, 50 min
• Segment 2: Dubois to Coeur d'Alene (I-15) - 260 miles, 4 hours
• Segment 3: Coeur d'Alene to Bonners Ferry (US-95) - 80 miles, 1.5 hours

Fuel stations are abundant along I-15, with clusters every 30-40 miles. However, on US-20 and US-95, stations are sparser, especially north of Sandpoint. We recommend filling up in Idaho Falls, Dubois, Dillon, and Coeur d'Alene. For those wondering how to find the best stops and hidden gems between cities, check out how to find the best stops and hidden gems between cities.

Road quality is generally excellent, with well-maintained asphalt on all major highways. I-15 is four-lane divided, while US-95 north of Coeur d'Alene is two-lane with passing lanes. Winter conditions can cause delays, so check weather forecasts. No tolls apply on any of these roads.

The landscapes transition dramatically. Starting on the Snake River Plain, you'll see vast farmland and lava fields. As you head north on I-15, you enter the Rocky Mountains near Dillon, with peaks and pine forests. The final stretch on US-95 winds through the Selkirk and Cabinet Mountains, with views of Lake Pend Oreille.

Local commerce along the route includes small towns like Dubois, Dillon, and Sandpoint. These towns have local shops, diners, and markets. In Sandpoint, visit the Cedar Street Bridge, a unique indoor marketplace. For culture, the Shoshone-Bannock tribe has a presence in Fort Hall, and you can learn about the area's history at the Lemhi County Museum in Salmon.

• Dubois: known for its sheep industry and the Idaho Sheep Festival
• Dillon: offers the Beaverhead Museum and historic downtown
• Sandpoint: artsy community with galleries and live music

Safety on this route is high, but long stretches on I-15 can induce fatigue. Plan stops every 2 hours. Rest areas are available at mile markers 24 (southbound) and 103 (northbound) on I-15. On US-95, there is a rest area near milepost 20.

For families, excellent stops include Craters of the Moon National Monument (detour near Arco), the Museum of the Rockies in Dillon, and Silverwood Theme Park near Coeur d'Alene. These are great things to do between Idaho Falls, ID and Bonners Ferry, ID.

• Craters of the Moon: hike lava tubes and see unique geology
• Museum of the Rockies: dinosaur fossils and planetarium
• Silverwood: roller coasters and water park

Pet-friendly stops are plentiful. Many rest areas have pet exercise areas. In towns, most parks allow dogs on leash. Recommended pet stops: Lions Park in Idaho Falls, and City Beach in Sandpoint.

Hidden off-route spots include the ghost town of Gilmore (near Leadore), the Sacajawea Interpretive Center in Salmon, and the Ross Creek Cedars (giant cedar grove near Troy). These require short detours but offer unique experiences.