Fossil Hunting in Colorado

2 verified locations for fossil hunting in Colorado. Each page includes exact permit requirements, restrictions, and what to know before you go.

2 Prohibited

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Prohibited

Garden Park Fossil Area

Colorado, Fremont·Fossil hunting

Fossil collecting is prohibited across all of Garden Park Fossil Area — a BLM Area of Critical Environmental Concern where even invertebrate fossils, normally open to casual collecting on BLM land, cannot be removed.

  • All fossil and rock collecting is closed across the entire Garden Park Fossil Area, not just vertebrate material — the site carries a triple protective designation (BLM Area of Critical Environmental Concern since 1996, Colorado Research Natural Area since 1991, and National Natural Landmark, expanded to 3,208 acres in 2013) that closes the area to consumptive resource use altogether
  • This is stricter than the PRPA default most BLM fossil sites on this list follow, where invertebrate and plant fossils stay open to 25 lb/day casual collecting while only vertebrate material is restricted — Garden Park's ACEC/Research Natural Area status removes that invertebrate carve-out entirely at this specific site
Prohibited

Picket Wire Canyonlands

Colorado, Otero·Fossil hunting

Every dinosaur track at Picket Wire Canyonlands is a vertebrate trace fossil, covered by PRPA's ban on casual collecting — this site is observation-only.

  • Every one of the site's 1,900-plus dinosaur tracks is a vertebrate trace fossil, and the Paleontological Resources Preservation Act prohibits casual collection of vertebrate material from federal land without a research permit — there's no invertebrate-collecting carve-out here the way there is at most fossil sites on this list, because the exposed bedrock is essentially the trackway surface itself
  • Access requires real planning, not a collecting permit: either an 11.2-mile round-trip hike, bike, or horseback trip from Withers Canyon Trailhead, or a reserved seat on a Forest Service-guided high-clearance 4x4 tour offered only on specific Saturdays in April, May, September, and October