Measuring the vertical expanse of Pinnacle Mountain reveals a summit elevation of 7,240 feet above sea level, a distinct prominence that rises sharply from the surrounding Arkansas River Valley. This specific altitude places the peak within a category of significant regional high points, offering a tangible benchmark for understanding the topography of the area. The measurement is not merely a number but a reflection of the geological forces that shaped this iconic landmark over millions of years.
Defining Summit Elevation
When asking how high a mountain is, the most direct answer comes from its summit elevation, the height of the highest point above the mean sea level. For Pinnacle Mountain, this official survey marker sits at 7,240 feet, providing a fixed reference point for cartographers, climbers, and geologists alike. This figure is determined through precise geodetic surveys and remains constant, even as the surrounding landscape weathers and changes.
Prominence vs. Elevation
While elevation answers the question of height above sea level, prominence measures the peak’s independence. Pinnacle Mountain boasts a prominence of 1,340 feet, meaning it rises at least that distance above the lowest contour line encircling it without a higher peak. This distinction highlights its striking visual impact; the mountain appears as a genuine landmark, towering significantly above the valleys and plains that cradle it, rather than being a mere foothill.
The Geological Story of the Height
The impressive elevation of 7,240 feet is a direct result of the mountain's unique geological composition. Pinnacle Mountain is an erosional remnant, composed primarily of quartzite and sandstone that is significantly harder and more resistant to weathering than the surrounding sedimentary rock. While water and wind eroded the softer rock of the Ouachita Mountains over millennia, this durable core remained, standing tall as the last vestige of a once vast mountain range.
Base Elevation: Approximately 5,900 feet, measured at the foothills within Pinnacle Mountain Park.
Summit Gain: A strenuous hike of roughly 1,340 feet from the trailhead to the peak.
Regional Context: Significantly higher than the adjacent Arkansas River, which sits near 300 feet elevation.
Contextualizing the Height Visually
Understanding the statistics becomes more intuitive when viewing Pinnacle Mountain within its visual context. The sheer drop-off on the western face, combined with the steep ascent, creates an illusion of even greater height. From the base of the mountain in the park to the summit feels like climbing a much larger peak, a testament to how dramatically the terrain changes within a relatively small geographic area.
Comparing to Regional Peaks
To fully grasp the significance of its 7,240-foot elevation, it is helpful to compare Pinnacle Mountain to other natural points in the region. While dwarfed by the massive Rocky Mountains thousands of miles to the west, it stands as one of the most prominent and accessible high points in central Arkansas. Its height is a notable exception on the relatively flat to rolling landscape of the Arkansas River Valley, making it a dominant geographic feature for miles around.
Why the Measurement Matters
The specific elevation influences more than just geography; it affects the local climate, vegetation, and recreational opportunities. The higher altitude can result in cooler temperatures and different wind patterns than the valley floor. For hikers, the 7,240-foot mark represents the goal of a challenging ascent, a benchmark of fitness and endurance that rewards the effort with panoramic views of the Ouachita National Forest and the sprawling cityscapes beyond.
