Facility · Wyoming ·
Managed by the Bureau of Land Management
Rock Springs Field Office (Bureau of Land Management WY) · Open Access
Constructed in the 1950s with the help of the Kiwanis Club, the Tri-territory Site is the location where the Mexican Territory, the Louisiana Purchase and the Oregon Territory intersected. This site includes flag poles for the flags of the countries represented by the three territories, and a central flagpole for the U.S. Flag. This is a fee-free site. It is NOT wheelchair accessible at this time.
Take State Highway 191 north 10 miles from Rock Springs. Go East on County Road 4-17 twenty-nine miles. Head North on County 4-83 three and a half miles; North on BLM 4102 three and a half miles to the site.
42.00000, -108.92000 · 42°0'0.0"N 108°55'12.0"W
Typically 83°F in Jul, down to 28°F in Jan.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 28 | 30 | 43 | 54 | 64 | 74 | 83 | 81 | 71 | 57 | 41 | 30 |
| Low °F | -4 | -2 | 14 | 22 | 32 | 40 | 45 | 44 | 33 | 22 | 10 | -2 |
| Precip in | 0.3 | 0.3 | 0.5 | 0.8 | 1.5 | 1.1 | 0.5 | 0.7 | 0.8 | 0.6 | 0.3 | 0.4 |
1991–2020 averages from the nearest NOAA station, 27.9 mi away — not measured at the facility itself, and elevation can make a real difference over that distance.
no fee
From Recreation.gov, which is not always current. The operator's own page is the authority on what you will be charged.
Recreation.gov last updated this record on 2026-02-25.
Facility information and photographs from Recreation.gov (RIDB). SpotOpened is not affiliated with Recreation.gov or any federal agency.
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