This account features photographs by Ronald C. Hill (1937–2023), a Denver-based photographer whose work spans railroads, aviation, automobiles, international travel, and everyday life from the 1960s onward. His archive includes thousands of color slides documenting trains across the American West, aircraft and airports, classic cars, travels abroad, and candid images of friends and daily moments from a rapidly changing era. I acquired his collection and am making these images available for licensed reproduction — preserving a lifetime of visual history through his lens.