Tohickon Creek was named by the Lenape, some of the first inhabitants of the area. "To-Hick-Hanne" means "Deer-Bone-Creek". Ralph Stover State Park was the site of an 18th-century gristmill that was built on Tohickon Creek by the park's namesake, Ralph Stover. Remnants of the mill and mill race can still be seen near Tohickon Creek.
High Rocks is a 200-foot (60 m) sheer rock face, composed of smooth red Lockatong Formation argillite interspersed with friable Brunswick Formation shale. Since slippery and crumbly rock makes climbing somewhat difficult here, High Rocks is notable mostly to local climbers. Over sixty routes have been put up here over seventeen walls, with difficulties up to 5.12c/d and V7. Most are used for trad climbing and top roping, with some bouldering and sport routes present as well.[4][5]
A hiking trail of 1 mile (1.6 km) passes the millrace. There is a shaded picnic area along Tohickon Creek and a scenic vista at the top of High Rocks.[1]
Nearby state parks
The following state parks are within 30 miles (48 km) of Ralph Stover State Park:[6][7][8]
According to the Trewartha climate classification system, Ralph Stover State Park has a Temperate Continental climate (Dc) with hot summers (a), cold winters (o) and year-around precipitation. Dcao climates are characterized by at least one month having an average mean temperature ≤ 32.0 °F (0 °C), four to seven months with an average mean temperature ≥ 50.0 °F (10 °C), at least one month with an average mean temperature ≥ 72.0 °F (22 °C) and no significant precipitation difference between seasons. Although most summer days are slightly humid at Ralph Stover State Park, episodes of heat and high humidity can occur with heat index values > 105 °F (41 °C). Since 1981, the highest air temperature was 102.0 °F (39 °C) on 07/22/2011, and the highest daily average mean dew point was 74.3 °F (24 °C) on 08/13/2016. The average wettest month is July which corresponds with the annual peak in thunderstorm activity. Since 1981, the wettest calendar day was 6.91 inches (176 mm) on 08/27/2011. During the winter months, the plant hardiness zone is 6b with an average annual extreme minimum air temperature of −1.7 °F (−19 °C).[9] Since 1981, the coldest air temperature was −14.2 °F (−26 °C) on 01/22/1984. Episodes of extreme cold and wind can occur with wind chill values < −13 °F (−25 °C). The average annual snowfall (Nov-Apr) is between 30 and 36 inches (76 and 91 cm), and the average snowiest month is February which corresponds with the peak in nor'easter activity.
Climate data for Ralph Stover State Park (Ranger Station), 1981-2010 normals, extremes 1981-2018
According to the A. W. Kuchler U.S. potential natural vegetation types, Ralph Stover State Park would have a dominant vegetation type of Appalachian Oak (104) with a dominant vegetation form of Eastern hardwood forest (25).[11]
^Geology and mineral resources of Bucks County, Pennsylvania, Bradford Willard, Jacob Freedman,
D. B. McLaughlin, and others. 1959. 243 p., 24 pls., geol. map.
^2007 General Highway Map Bucks County Pennsylvania(PDF) (Map). 1:65,000. Pennsylvania Department of Transportation, Bureau of Planning and Research, Geographic Information Division. Archived from the original(PDF) on November 6, 2011. Retrieved July 27, 2006. Note: shows Ralph Stover State Park