Lost Gold Trails Loop

Follow the Lost Gold Trails Loop through rolling terrain in eastern Idaho. This byway runs along an early gold rush route, historic sites like the Heritage Hall Museum, the gateway to the Nez Perce Historic Trail and Beaver Canyon. When the gold near Spencer disappeared, opals took over, and you can still dig for opals in this area today. During the spring and fall, this route often features wild game grazing along its length.


52 miles
83.6 km

Time Icon


1 hour, 30 minutes


Eastern Idaho

When to Visit

Spring, Summer, Fall

31 Byways. 31 Ways to Be Inspired.

A variety of scenic, natural, historic, recreational, archeological and cultural experiences can be found on Idaho’s 31 scenic byways. View the video to get a taste of the adventures that await you, and start planning your next road trip.

Road Trip Tips

Turn-by-Turn Directions: The byway begins on A-2/Red Road Junction at the “Y” Junction east of Dubois. It follows this route to Old Highway 91 north of Dubois to Spencer. The route then heads east on Spencer/Idmon road connecting to Idmon/A-2 Junction and the Fort Henry Historic Byway. Continue north toward Kilgore and east to Island Park, or turn south and return to the “Y” Junction at the start of the route.

Road Conditions: Two roads (A-2 and Spencer/Idmon Road) close during winter. Check weather conditions before your trip.

Full Services in: Dubois

Partial Services in: Spencer, Kilgore

Motorcycle Route: Yes

Full Services: When gas, food and lodging are available

Partial Services: When gas and a few other facilities are available

Nearby Adventures

Exploring eastern Idaho on this notable byway offers interpretive sites, outdoor recreation and even the chance to mine for your own opals. In the wintertime, several roads become snowmobiling routes in this scenic setting.

Download Before You Hit the Road

Start planning your epic Idaho road trip with the help of these free travel publications.

Idaho Roadsider

State Highway Map

Travel Tips

Need some ideas for your next Idaho road trip? Check out these travel tips and start planning your adventure.

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