Interstate 15 North - Scipio to Nephi

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The ranch exit with Tower Road lies along I-15/U.S. 50 at Scipio Pass.
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I-15/U.S. 50 descend 500 feet in elevation northeast from the Canyon Mountains into Scipio Valley.
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U.S. 50 separates from I-15 north at the diamond interchange (Exit 188) with 400 North in the town of Scipio.
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U.S. 50 turns south onto State Street (old U.S. 91) en route to Round Valley between the Pahvant Range and Valley Mountains. The I-15 Frontage Road to the south diverges east along old U.S. 50-91 to Center Street in Scipio.
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U.S. 50 arcs southeast to Salina, where it joins Interstate 70 east to Green River and Grand Junction, Colorado.
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Old Yuba Dam Road stems south from the diamond interchange at Exit 202 to Yuba Lake State Park.
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Interstate 15 bee lines northeast past the West Hills to a diamond interchange (Exit 207) with SR 78 by Chicken Creek Reservoir.
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SR 78 constitutes a 9.41 mile long highway from Mills Road at Exit 207 northeast to SR 28 (Main Street) in the town of Levan.
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Mills Road extends west from I-15/SR 78 along Chicken Creek to the settlement of Mills.
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SR 28 follows old U.S. 91 north from Levan in Juab Valley to Exit 222, the first of three interchange along I-15 for the Juab County seat of Nephi.
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SR 28 (Main Street) becomes part of Business Loop I-15 north from Exit 222 to Downtown Nephi.
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Prior to 2006, Business Loop I-15 between Exit 222 and 227 was designated as SR 41. Legislature then renumbered the route along old U.S. 91 as a northward extension of SR 28.
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Originating from U.S. 89 in Gunnison, SR 28 heads 43.67 miles north to Fayetteville, Levan, Nephi and I-15 at Exit 227.
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Interstate 15 encircles Nephi to the east along the San Pitch Mountains foothills to SR 132 (100 North) at Exit 225.
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Forming a 63.20 mile long arc, SR 132 joins Nephi with U.S. 6 at Lynndyl to the west and Fountain Green, Moroni and U.S. 89 at Pigeon Hollow Junction to the southeast.
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The section of SR 132 between I015 and U.S. 89 was a former alignment of U.S. 189. It was decommissioned in 1938 in favor of the alignment between Provo and Jackson along what was SR 7, U.S. 530 and U.S. 30S northeast to Evanston, Wyoming.
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Passing between the Wasatch Range foothills and Nephi street grid, I-15 advances north to the diamond interchange (Exit 228) with Business Loop I-15/SR 28 (N Main Street) south.
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Business Loop I-15 and SR 28 overlap 4.95 miles through Nephi, "The Friendly City at the Crossroads of Utah," north to Exit 228.
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Old Highway 91 emerges from Business Loop I-15/SR 28 (N Main Street) just west of Exit 228. U.S. 91 parallels I-15 northward to Main Street in Mona.
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Progressing north through Juab Valley, Interstate 15 passes the town of Mona east to a diamond interchange (Exit 233) with SR 54 (300 North).
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Just 1.343 miles in length, SR 54 spurs west from Exit 233 to Main Street (old U.S. 91) at 200 North near the Mona business district.
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Interstate 15 and adjacent Old Highway 91 navigate through an S-curve by the town of Rocky Ridge north ahead of the diamond interchange (Exit 242) with Summit Ridge Parkway west in Santaquin.
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"A Breath of Fresh Air." the city of Santaquin represents the southern extent of the Wasatch Front metropolitan region. Incorporated on January 4, 1932, Santaquin grew from a population of 4,834 in 2020 to 13,725 in the 2020 Census.
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Summit Ridge Parkway is an arterial looping west from the diamond interchange at Exit 242 to newer suburban development and north through Santaquin to U.S. 6.
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U.S. 6 (Main Street ) converges with Interstate 15 east from the Santaquin business district at Exit 244, opposite SR 198 along old U.S. 6/91.
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U.S. 6 travels west from Santaquin across Goshen Valley to Eureka and south from there to U.S. 50 in Delta. U.S. 6/50 overlap west to Ely, Nevada, parting ways on separate courses through some of the most desolate areas of the Great Basin.
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SR 198 follows old U.S. 6/50/91 northeast from Exit 244 to Spring Lake, Payson, Salem and Spanish Fork. U.S. 6 overlaps with I-15 north to Exit 257B.
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