A shelter on the bank of a lake reflecting trees and sky (Instagram@kaitlyncasso)

Osbornedale State Park

Derby, CT

Visit Osbornedale State Park for a hike or fishing expedition, then relax with a picnic or visit the Osborne Homestead Museum and its historic gardens. Environmental science plus changing local artist exhibits are found at the Kellogg Environmental Center.  Those looking for another recreational activity during the wintertime, head to Osbornedale where you can skate across the huge frozen pond found within the park — the only area within the state that is constantly tested for safe ice!

Located in the Naugatuck Valley Hills just east of the Housatonic River in Derby and Ansonia, the land was once the lushly forested hunting grounds of the Paugussett Tribe. Colonists began arriving in the late 1650's and gradually traded items such as clothing or cooking utensils for land. Because the Europeans concept of property rights was not embodied in the Indian culture, the Indians often sold the same parcel of land several times.

In 1956, Osbornedale State Park was willed to the people of Connecticut by Frances Osborne Kellogg, granddaughter of John W. Osborne, one of the Naugatuck Valley's early industrial entrepreneurs. By adhering to the belief that one should always buy land but never sell it, Mrs. Kellogg gradually acquired the numerous separate farms which now comprise the 350-acre Osbornedale State Park, an unusually large property in the Derby-Ansonia area. Within the park, Kellogg Environmental Center offers teacher workshops, art exhibits, family nature activities, and general public programs throughout the year.

Views from the Park

43 Chatfield Street
Derby, CT 06418


Open Daily 
(8:00 a.m. – Sunset)


Main (203) 735-4311

Aerial view of fall trees and town (Instagram@valley_aerial_optics)



Know Before You Go

Places To Visit




Osbornedale State Park is a great place for any geology enthusiast. Not only are there several different rock types exposed in the park, but also within the park's boundaries there are geologic folds, quarries, and abandoned mines. Additionally, families can enjoy the wonderful Kellogg Environmental Center that is on the park's property. 

Rock Types Found on Main Trail: 

Igneous (Diabase), Metamorphic (Schist, Gneiss)

Rock Units: 

Carrington Pond Member (Ordovician): Interlayered rusty weathering schist and light gray gneiss; Harrision Gneiss (Ordovician): Medium-grained foliated gneiss

Minerals of Interest: 

Quartz crystals, Biotite, Feldspar

Interesting Geologic Features: 

Folds, Quarry, Mines, Dike, Parallel Fractures, Natural Spring






Reserve an open air picnic shelter

Field Trips


The Kellogg Environmental Center and Osborne Homestead Museum is available for groups to visit as part of organized educational programming provided by schools, camps and community organizations. Our education team offers hands-on, engaging educational programs and investigations, to encourage students to develop critical thinking skills to explore environmental and historical questions and issues. All programs are available for school, youth groups, and organizations and can be presented either on or off-site. Custom programs are available.





Environmental Center


Picnic Tables



Yes, on leash