The park has two ravines up to 120 feet deep with steep banks at 45 degree angles. Unlike common gullies, trenches or sinkholes caused by temporary flooding, the steephead ravine is a permanent feature with a spring-fed creek that never dries up, called Whitewater Branch. The underground water bubbling up cuts into the bank and carries the sand and soil downstream to the St. Over thousands of years the ravine has widened and deepened to what you see today. In 1933, this ravine was transformed into a dramatic garden by the federal Works Progress Administration. Much of the original landscaping still exists as formal gardens and an extensive trail system. A 1.8-mile paved road winds around the ravine, offering motorists and bicyclists a view of the gardens. The Ravine Loop is closed to vehicle traffic one hour before sunset, but remains open for pedestrians, bicycles, and wheelchairs. The garden's peak flowering period is azalea season, late January to April. Numerous picnic sites, equipped with tables and grills, are available to visitors. Campbell Civic Center complex features a large covered pavilion, auditorium, and meeting rooms that are available for rent.
