Thundering Spring
Thundering Spring flows 75°F water, 11 degrees above ambient, in Upson County near Hannahs Mill, requiring a moderate woodland walk.
The spring emerges at 695 feet elevation in rolling terrain where small stream valleys cut through the gentle ridges of Georgia's Piedmont. Water flows audibly into a small pool surrounded by large boulders and dense forest understory, justifying the dramatic name that locals apply to this sonorous spring.
The spring's evocative name likely derives from the loud water noise that occurs as flow drops steeply into the emergence pool—a sound amplified by the surrounding rock formations. Formation follows the typical Piedmont pattern of groundwater circulation through fractured basement rock at depth.
Walk 341 feet (104 meters) from nearby roads through oak and hickory forest to reach the pool. Water stays 75°F year-round. Spring and fall offer the best trail conditions; summer humidity can be intense. No facilities; plan for self-sufficiency and bring water.