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The David S. Ammerman Trail follows a former Pennsylvania Railroad branch for about 11 miles across Clearfield County, from Clearfield through Curwensville to Grampian. The crushed stone surface is mostly smooth, and the grade features a steady climb of about 400 feet mostly toward Grampian. The corridor keeps company with water the entire way: the West Branch of the Susquehanna River out of Clearfield, then Anderson Creek and Kratzer Run toward the western end. Old railroad bridges, farmland, and stretches of woods break up the miles, and Curwensville sits near the midpoint with parking and services. Trailheads with parking sit in Clearfield, at Uncles, at Arnoldtown Road, at the NARCO lot, and in Grampian.
David S. Ammerman Trail
Your comfort. Prognosticated.
-Cory

In a typical year the David S. Ammerman Trail has about 99 to 145 days of excellent weather for popular activities such as hiking, dog walking, e-biking, running, biking, walking, and birding, with May, September, and October the best months.
Hourly comfort scores for the next 15 days of weather, tuned to your activity and your own thresholds.
Plan your visit to this trail. Get the best windows for a comfortable outing.
Enjoy the David S. Ammerman Trail!

In half of past years, color along the David S. Ammerman Trail peaks October 13 to 26, typically around October 19. The trail has 42% deciduous coverage, with the majority being red maple, northern red oak, and black cherry.
The Great Shamokin Path carried Lenape and Mohican travelers along this corridor before any rail was laid. The railroad came with the Tyrone and Clearfield, chartered on March 23, 1854, to open the coal and timber country of the Allegheny Plateau. The Pennsylvania Railroad leased the company from the beginning of operation. In 1867 the Pennsylvania foreclosed on it and reorganized it as the Tyrone and Clearfield Railway. The line pushed on past Clearfield in the late 1860s and 1870s, and several railroad bridges from that era still stand along the trail. Its trains carried coal and quarried stone toward the East Coast along with clay for the many brickyards that grew up along the route. Traffic faded, and the branch was abandoned. In January 1991 local residents formed the Clearfield County Rails to Trails Association as a nonprofit corporation, with attorney David S. Ammerman as solicitor and driving force. On July 30, 1992, the association bought the abandoned line from Conrail. The first stage, 5.3 miles from Clearfield to Curwensville, was completed in 1996. The second stage, 5.2 miles from Curwensville to Grampian, followed in 1998, and a ribbon cutting officially opened the full trail on October 4, 1998. Ammerman died in July 2010. In 2011 the association renamed the Clearfield to Grampian Trail the David S. Ammerman Trail in his memory.
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