Old Maps of Union, Oregon for Metal Detecting

Plan your next treasure hunt with 10 historic maps of Union. Find old homesites, ghost towns, trails, and gathering spots that may be lost to time — perfect for identifying promising metal detecting locations.

  • Locate forgotten sites: Uncover places like long-lost settlements, abandoned rail lines, or gathering spots.
  • Plan better hunts: Use map overlays combined with LiDAR or satellite views to narrow in on historically rich areas.
  • Made for detectorists: Thousands of hobbyists use these maps to discover relics, coins, and hidden history.

Use these historic maps to boost your research and find new opportunities beneath the surface of Union.


Union, OR maps

(10)
  1. 1906 Map of Telocaset
    1906 Map of Telocaset
    1906 Telocaset
    1906 Print · USGS
    Eastern Oregon at the peak of its railroad and ranching era features a landscape of thriving valley towns and high forest reserves. Genealogists and local historians can trace early settlements like Union and Cove, or locate long-standing landmarks such as Hot Lake and Medical Springs.
    3 unique versions available

  2. 1955 Map of Grangeville, 1964 Print
    1955 Map of Grangeville, 1964 Print
    1955 Grangeville
    1964 Print · USGS
    The high country of the Idaho-Oregon border comes alive in the mid-1950s, showing the deep river canyons and mountain peaks. Trace the Union Pacific RR through the valleys or locate settlements like Grangeville, Joseph, and the shoreline of Wallowa Lake.
    4 unique versions available

  3. 1959 Map of Grangeville
    1959 Map of Grangeville
    1959 Grangeville
    1959 Print · USGS
    The high alpine peaks and deep river canyons of the Idaho-Oregon borderlands are captured in the late fifties. Researchers can trace the Union Pacific RR through the valleys to settlements like Enterprise, Union, and Grangeville.
    2 unique versions available

  4. 1965 Map of Union, 1967 Print
    1965 Map of Union, 1967 Print
    1965 Union
    1967 Print · USGS
    Union and the surrounding valley floor are captured here in the mid-sixties, a period of established ranching and rail activity. Researchers can locate the Eastern Oregon Livestock Exposition Grounds, the Union Pacific line, and the small settlement of Crooks.

  5. 1966 Map of Craig Mountain, 1967 Print
    1966 Map of Craig Mountain, 1967 Print
    1966 Craig Mountain
    1967 Print · USGS
    The eastern edge of the Grande Ronde Valley was a center for rail transport and irrigation in the mid-1960s. Genealogists and historians can trace old homestead water sources and rail connections near Union, Hot Lake, and the Oregon of Union Railroad.

  6. 1986 Map of Enterprise, 1987 Print
    1986 Map of Enterprise, 1987 Print
    1986 Enterprise
    1987 Print · USGS
    The high peaks and deep valleys of Northeast Oregon are captured in the mid-1980s, showcasing the transition from the Grande Ronde Valley to the wilderness. Researchers can trace the Union Pacific rail corridor through Telocaset or locate historic sites like Cornucopia and Medical Springs.

  7. 1994 Map of Union
    1994 Map of Union
    1994 Union
    1994 Print · USGS
    The community of Union is captured in the mid-1990s as the anchor of the southeastern Grande Ronde Valley. Researchers can trace local landmarks like the Eastern Oregon Livestock Exhibition Grounds, the High Sch, and the winding path of Catherine Creek.

  8. 1994 Map of Craig Mountain
    1994 Map of Craig Mountain
    1994 Craig Mountain
    1994 Print · USGS
    The Grande Ronde Valley meets the steep slopes of Craig Mountain in the 1990s, where geothermal activity and historic rail grades define the terrain. Trace family land near Hot Lake, Union Junction, and the waters of Catherine Creek.

  9. 2023 Map of Union, 2023 Print
    2023 Map of Union, 2023 Print
    2023 Union
    2023 Print · USGS
    The eastern edge of the Grande Ronde Valley is documented here as it appeared in the early twenty-first century. Genealogists and local historians can trace the town of Union and its surrounding rural landmarks, from Union Cem to the irrigation works of the Catherine Creek Highline Canal.

  10. 2024 Map of Craig Mountain, 2024 Print
    2024 Map of Craig Mountain, 2024 Print
    2024 Craig Mountain
    2024 Print · USGS
    The eastern Grande Ronde Valley transition into the Blue Mountains is captured here in recent detail. Researchers can trace historic water rights and land use through features like Grout Ditch, the Hot Lake Reservoir, and the roads leading into Union.

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