Allegheny National Forest Centennial 1923-2023

Allegheny National Forest Centennial Celebration

HAPPY 100th BIRTHDAY, Allegheny National Forest (ANF)!

On September 24, 2023, the public joined our staff and partners at Twin Lakes Recreation Area to celebrate 100 years of recovery and growth. With your support, we will sustain a resilient forest for future generations!


This Month in History

2009 Biology Staff on the Allegheny National Forest

August - During my tenure as Forest Biologist on the Allegheny National Forest (ANF) from 1986 through 2009, I had the opportunity to work on many exciting wildlife projects. Many of those projects have been described in articles written for the Centennial celebration. But it’s not always about the task at hand, but more often about the people you get to work with. - Brad Nelson, Widlife Biologist, retired


  • Can You Hike It? Hike 100 Miles to Commemorate 100 Years!

    Centennial: Hiking Challenge - Father and Kids

    Come join us in celebrating 100 years of growth and adventure on the Allegheny National Forest by hiking 100 miles. The Centennial Hiking Challenge will take you to over 100 miles of the best and most beautiful trails we offer.

  • ANF Centennial Geocache Challenge

    Two boys geocaching

    Explore the beauty of the Allegheny National Forest while learning about its history and ecology. Search for 28 geocaches hidden across the four counties of ANF (Elk, Forest, McKean and Warren counties). When you find FIVE centennial geocaches in EACH of the FOUR counties, claim a trackable centennial token or coaster at any ANF office.


  • Theodora Cope and the Allegheny National Forest

    A professional, black and white portrait of Theodora Cope.

    Imagine yourself as a woman naturalist camping on the Allegheny National Forest in the summer of 1933. You’re a graduate student at Cornell University – at a time when women made up less than 10 percent of science and engineering graduate students in the country. You're Theodora Cope, and the research you do for your doctoral dissertation is still being used to this day.

  • A Century of Regrowth: The Little Arnot Photo Series

    Greyscale image of a forest with mature trees and little underbrush

    Forests are constantly growing and changing. The US Forest Service has studied forest growth and change on the Allegheny Plateau since 1923, when both the Allegheny National Forest and the Northeastern Research Station were established. The Little Arnot Photo Series documents in images the forest at different stages, as well as providing information about each stage of forest growth.

Key Contact

For more information on the Centennial, please contact:

Shoshanna Ochocki, Public Affairs Information Assistant