In November 1849, after suspending work on his road for a season, Pratt was called to head an exploring company of fifty men to southern Utah and to counsel Brigham Young on promising areas for new settlements. Pratt gave to the legislative assembly optimistic forecasts for settling the present sites of Richfield, Marysvale, Parowan, Cedar City, Washington, Santa Clara, Mountain Meadow, Beaver, and Payson. His company brought back samples of iron ore, coal, and other minerals. He provided specific information on weather, soil conditions, water, forestation, and other topographical conditions.
He opened his toll road in 1850, and during its first season of operation collected $1,500 from California-bound gold seekers and others. He left for a mission to Chile the following year, and the road largely fell into disuse. Today, what was then the "Golden Pass Road" is the Interstate 80 freeway through Parleys Canyon, a major scenic route into the valley, and one that services numerous communities east of Salt Lake City.