Utah State Route 315

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State Route 315 marker

State Route 315
750 North
Route information
Defined by Utah Code §72-4-137
Maintained by UDOT
Length1.760 mi[2] (2.832 km)
Major junctions
West endWillard Bay State Park
  I-15 / I-84 in Willard
East end US-89 in Willard
CountiesBox Elder
Highway system
  • State highways in Utah

State Route 315 (SR-315) is a short state highway in Box Elder County, Utah. It serves to connect U.S. Highway 89 and Interstate 15/Interstate 84 to Willard Bay State Park.

Route description[edit]

SR-315 begins at the entrance to the parking lot at the north marina of Willard Bay State Park, within the boundaries of the state park. It proceeds north through the park, passing entrances to Eagle Beach and Cottonwood Campground. After approximately 0.7 miles (1.1 km), the route passes the fee station and exits the park boundary, before making a turn to the northeast onto 750 North. The route then comes to a diamond interchange at I-15/I-84, exit 357 on that highway. It then crosses the Union Pacific Railroad before veering slightly east. It continues another 0.75 miles (1.21 km) east through the town of Willard before coming to its east end at US-89.[3]


When I-15 was built through the Willard area, several surface roads were constructed as well, including 750 North; the Utah Department of Transportation Region One director recommended 750 North be added to the state highway system. Discussions within UDOT concluded the route should be extended to the state park and designated as a park access road, therefore receiving a number in the 281–320 range. On December 20, 1974, the Utah Transportation Commission approved a resolution to add 750 North and the road to the marina to the state system as SR-315.[1]

Major intersections[edit]

The entire route is in Willard, Box Elder County.

0.0000.000Willard Bay State Park marina parking lotWestern terminus
0.7061.136State park fee station
I-15 / I-84 – Ogden, Tremonton
1.7602.832 US-89 – Willard, Perry, Brigham CityEastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b "State Route 315 Resolutions" (PDF). Utah Department of Transportation. December 2008. Retrieved 20 May 2019.
  2. ^ a b "State Route 315 Highway reference" (PDF). Utah Department of Transportation. 4 May 2017. Retrieved 20 May 2019.
  3. ^ Google (20 May 2019). "Overview of SR-315" (Map). Google Maps. Google. Retrieved 20 May 2019.