![]() | U. S. Interstate 15 |
Tom Schweich |
![]() Topics in this Article: Montana Idaho Utah Leeds Nevada California |
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U. S. / Canada Border
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| Montana
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| Sweetgrass
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Exit: 363, for Shelby, Montana.
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Locations: Marias River.
Cross Marias River.
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Junction: US Interstate 90, East of Butte.
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Locations: Butte.
| Butte
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| Exit 121Junction: U. S. Interstate 90
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Montana above … | Idaho below …
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Junction: US Highway 20, east to Yellowstone.
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Exit 190: …, to somewhere.
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| Idaho
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Exit 119: US Highway 20, east.
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| Idaho Falls
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Exit 118: US Highway 20, Broadway, west, or into downtown.
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Exit 116: I-15 Bus., US Highway 26, W. Sunnyside Road, business route through downtown Idaho Falls.
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| BlackfootExit 93: US Highway 26, northwest.
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| Chubbuck
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Exit 72: US Interstate 86, west to Boise, Idaho, and Portland, Oregon.
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Exit 71: Pocatello Creek Road
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| PocatelloExit 69: Center Street, to downtown Pocatello.
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Jct: US Highway 91, south past Zenda to Logan, then west back to US I-15.
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Idaho above | Utah below
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| Utah
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| TremontonJunction: US Interstate 84, at its Exit 41
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| Brigham CityJunction: US Highway 91, east to Logan, then north back to US I-15.A reason to take US Highway 91 as an alternate to Interstate 15 would be to see the spillway of Pleistocene Lake Bonneville into the Snake River drainage. The bedrock threshold that established the Provo shoreline is at Red Rock Pass, while an earlier failed alluvial dam is placed at Zenda.
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Locations: Salt Lake City.
| Salt Lake City
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Junction: U. S. Interstate 80, West, across Nevada to San Francisco.
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Junction: U. S. Interstate 80, east to Wyoming
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Locations: Salt Lake Valley.
| American ForkThe approximate south end of Salt Lake Valley
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Junction: US Highway 6, east to Colorado.
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Locations: Spanish Fork.
| Spanish Fork
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Junction: US Highway 6, west.
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Locations: Santaquin.
| Santaquin
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Locations: Scipio.
| Scipio
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Junction: U. S. Highway 50, east through Salina to US Interstate 70.
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Locations: Holden.
| Holden
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Junction: U. S. Highway 50, west across Utah and Nevada to Sacramento, California.
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Junction: U. S. Interstate 70, east across Utah and Colorado.
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Junction: Utah Highway 160, north side of Beaver, use this exit for Utah Highway 21 when coming from the north.
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| BeaverNo Exit: UT Highway 21, west through Minersville and Milford to the Nevada border near Great Basin National Park and US Highway 50.
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Junction: Utah Highway 160, south side of Beaver, use this exit for Utah Highway 21 when coming from the south.
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Beaver River basin to the north ... | Beaver Ridge Parowan Valley to the south.
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Beaver County above … | Iron County below …
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Locations: Parowan Valley.
| Parowan Valley
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Junction: Utah Highway 271, access road to Paragonah.
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| ParagonahRed Creek exits through the Hurricane Cliffs into Paragonah. On Red Creek, S. L. Welsh made a collection of Frasera albomarginata.
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| Parowan
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Junction: Utah Highway 130, north to Minersville.
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Locations: Cedar City.
| Cedar City
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Junction: Utah Highway 56, West to Nevada.
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Junction: Utah Highway 14, East.
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View of Fort Harmony, and the Harmony Mountains across US Interstate 15.
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Locations:
Kolob Canyons, Zion National Park.
Overlook in Kolob Canyons, Zion National Park.
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View southwest toward Saint George along US Interstate 15.
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Locations: Browse Area Guard Station.
Exit 30: Forest Service Road, possibly F. R. 037, up South Fork Ash Creek and Mill Creek to the Browse Area Guard Station, collection locality of Frasera speciosa
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| Anderson JunctionExit 27: Utah Highway 17, South to Toquerville, and UT Highway 9 to Zion National Park, or to UT Highway 59, AZ Highway 389, to Kanab, Utah, Page, Arizona, and points east.
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Locations: Italian Spring.
Cross Grapevine Wash. | Grapevine Wash drains Italian Wash, which drains Italian Spring. There is a collection of Frasera albomarginata from Italian Spring.
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Exit 23: Silver Reef Road, to Oak Grove Road and the Oak Grove Campground.
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Locations: Leeds. Silver Reef.
| LeedsSite of Silver Reef to the north.
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Exit 16: Utah Highway 9,
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Exit 8: Saint George Blvd., UT Highway 34
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Locations: Saint George.
| Saint George
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Exit 6: |
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Exit 2: Southern Parkway, Sun River Parkway.
| This is the approximate location of the crossing of the Old Spanish Trail from east to west. To the west the trail skirted the south side of Bloomington Hill and ascended Curly Hollow Wash. From the east the trail descended Fort Pearce Wash.
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Utah above. | Arizona below.
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Locations:
Virgin River.
Virgin River Gorge Recreation Area. | We stopped here for lunch one time and watched some rafters launch their raft, and drift downstream into the gorge.
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Locations:
Virgin River.
I have driven through the Virgin River Gorge on US I-15 twice in the northeasterly direction, and neither time have I seen a good place to stop for a photograph.
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Locations: The Narrows. Virgin River Gorge.
The Narrows of the Virgin River Gorge.
| As an application of their criteria-based methodology for determining the mechanism of transverse drainage development, Douglass, et al. (2009) determined antecedence as the mechanism for transverse drainage through Virgin River Gorge.
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Exit 27: Black Rock Mountain Road
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Locations: Beaver Dam Mountains. Virgin Mountains.
Beaver Dam Mountains to the northwest. Vrigin Mountains to the southeast.
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Locations: Littlefield.
| Littlefield
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The road north from Littlefield goes to the Joshua Tree Natural Area in southwestern Utah. I have been unable to find a name for this road. Comstock, Cooper and Ehleringer's (1988) site two for their study of patterns of canopy development and carbon gain is 16 km north of Littlefield within the Joshua Tree Natural Area.
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Arizona above … | Nevada below …
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| Nevada
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Junction: N. Sandhill Blvd., E. Pioneer Blvd., I-15 Business
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Locations: Mesquite.
| Mesquite
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Junction: W. Mesquite Blvd., Interstate 15 Business
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Locations: Bunkerville.
Bunkerville to the southeast across the Virgin River.
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Locations: Virgin Mountains. Virgin Peak.
Virgin Mountains in Clark County, Nevada, to the southeast across the Virgin River.
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Junction: Nevada State Route 170, to Bunkerville and Gold Butte Road.
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Junction: Nevada State Route 12
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| GlendaleJunction: Nevada State Route 168, for Glendale, to Moapa, and US Highway 93 at Coyote Springs.
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