Observed arrival · 2026-09-09
GroundRove Maps the Unlisted Ground
An Android research and offline field-mapping app for investigating Colorado mineral evidence, geology, mining claims, historic mines, and land status.
Field notes
GroundRove presents a layered Colorado map rather than a directory of established rockhounding destinations. Its stated sources include BLM MLRS claim records, USGS and former USBM mineral and mine records, Colorado Geological Survey geology and mining datasets, and offline OpenStreetMap or Protomaps context. Users can inspect claim type, status, serial information, acreage, and mapping-quality notes, while the site cautions that mapped claim geometry is not a surveyed legal boundary.
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