Fossil Hunting in Connecticut
Why Connecticut?
Connecticut punches well above its weight in paleontological significance. The Connecticut River Valley preserves some of the finest Early Jurassic dinosaur trackways in the world. Dinosaur State Park in Rocky Hill is a must-visit destination where hundreds of Eubrontes tracks, likely made by Dilophosaurus-like theropods, are displayed under a protective dome. While hands-on collecting opportunities are limited, the educational value is outstanding.
What You’ll Find
The signature fossils here are dinosaur tracks. The Early Jurassic rift basin sediments preserve trackways from theropod and ornithischian dinosaurs, as well as smaller trace fossils. Fish fossils, including small semionotids, are occasionally found in the brownstone sediments. Plant impressions from the Mesozoic also occur in the Hartford Basin deposits. Do not expect to build a large collection from Connecticut, but what is here is historically important.
Best Time to Visit
Dinosaur State Park is open year-round, though the outdoor casting area operates from May through October (bring your own plaster of Paris and cooking oil). Spring and fall offer comfortable temperatures for outdoor exploring. Summer can be hot and humid in the valley.
Tips for Connecticut Collecting
Start at Dinosaur State Park for an excellent introduction to ichnology, the study of trace fossils. The park’s casting program lets you take home a replica of a real dinosaur footprint, an activity especially good for families and beginners. Beyond the park, collecting opportunities are genuinely limited. The brownstone quarries that historically produced many tracks are mostly closed or private. If you find exposures in construction sites or roadcuts, always get permission before collecting. Connecticut’s geology is mostly crystalline basement rock outside the rift basin, so focus your efforts on the central valley.
Collecting Sites
Dinosaur State Park
Public (Fee)Rocky Hill, Hartford County
World-class tracksite with around 500 exposed Eubrontes tracks under a geodesic dome. Visitors can make plaster casts of real tracks at an outdoor area (seasonal).
Powder Hill Dinosaur Park
Free Public AccessMiddlefield, Middlesex County
Small municipal park with exposed Early Jurassic trackways. Viewing only; collecting is not permitted.
Legal Rules for Connecticut
Fossil collecting is prohibited at Dinosaur State Park and most state parks. Powder Hill allows viewing but not collecting. Roadcuts and private land with permission may yield finds. Always check with local authorities before collecting on any public land.
Read our full legal guide for federal laws and more details.
Key Geological Formations
- Portland Formation (Early Jurassic)
- East Berlin Formation (Early Jurassic)
- New Haven Arkose (Triassic-Jurassic)