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Before wagons and railroads, the Purgatoire River Valley drew dinosaurs, reptiles, and some of the world’s first mammals. Visit ancient history on a hike or excursion, or view artifacts in town.

KT Boundary at Trinidad Lake State Park

Trinidad Lake State Park is home to the KT Boundary, a geological line marking the extinction of dinosaurs and the beginning of the age of mammals. Glimpse this feature in Long’s Canyon.

Trinidad Lake State Park trail system sign, Colorado
  • Cupulin Volcano National Monument

    Capulin Volcano National Monument

  • Comanche National Grasslands, Colorado

    Comanche National Grassland

  • Longs Canyon Watchable Wildlife Area, Trinidad, Colorado

    Long’s Canyon Watchable Wildlife Self-Guided Trail at Trinidad Lake State Park

  • Simpson's Rest, Trinidad, CO

    Simpson’s Rest and Trinidad Sign

  • Dikes along Highway of Legends Scenic Byway, Colorado

    The Great Dikes of Spanish Peaks Country

  • Trinidad Lake State Park, Trinidad, CO

    Trinidad Lake State Park

Meet the Pioneers & Miners

Generations of settlers from diverse backgrounds didn’t just cut through mountain passes and chart the Santa Fe Trail. They blazed trails of their own, too. Discover their contributions to the American West.

Historic Photo of Main Street Trinidad, CO

Tour Historic Downtown

Rewind to the hustle and bustle of Trinidad’s early business and cultural scene.