Expedition Island
Added to the National Register in 1968, and a National Historic Landmark.
The record
| Property type | Site |
| Address | S of Union Pacific RR bridge, near E bank of the Green River, Green River, WY |
| County | Sweetwater County |
| Listed | Nov 24, 1968 |
| Listed for | Exploration and settlement |
| Level of significance | National |
| Reference number | 68000056 |
| Designations | National Historic Landmark |
The nomination form, the document that argues why this place matters, is in the National Archives: Read the nomination ↗
Visiting
| Address | S of Union Pacific RR bridge, near E bank of the Green River, Green River, WY |
| Coordinates | 41.523° N, 109.471° W · Directions ↗ |
Explore
Map
Nearby in Sweetwater County
Local history books for Sweetwater County
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Wyoming travel guides
Titles come from Open Library's catalog, matched by subject heading or by title.
Reference
Questions people ask
When was Expedition Island listed on the National Register?
Nov 24, 1968. It is also a National Historic Landmark, the higher of the two designations.
Source: National Park Service
Where is Expedition Island?
S of Union Pacific RR bridge, near E bank of the Green River, Green River, Sweetwater County, Wyoming.
Source: National Park Service
Where is the nomination form for Expedition Island?
The National Archives holds the nomination form, the document that made the case for listing.
Source: National Archives
Is there a wildfire near Expedition Island right now?
1 active incident within 50 miles as of 2026-10-17, nearest D1 Pondo Rx, 44 miles away.
Source: Map
Sources
Name, location, type and dates come from the National Register office's spreadsheet of listed properties, because the Park Service's spatial data does not carry this listing. The map point comes from Wikidata. Construction date, architect, style, photograph and encyclopedia link come from Wikidata and Wikimedia Commons, matched on reference number 68000056. Nothing here is transcribed by hand. The nomination form and photographs ↗ at NPGallery are the original nomination as filed with the National Park Service, and the form is often the best description of the place.