A 10-foot (3 meter) ditch was dug in front of the walls and filled with sharpened sticks to deter an enemy charge. The fortress was never directly attacked during the War and by 1932 much of it had been lost, destroyed by development. Of its original of earthworks only remain. The remaining earthworks comprise the "Fortress Rosecrans" section of the Park. Of the four interior redoubts within Fortress Rosecrans, only Redoubt Brannan survives to this day. Redoubt Brannan lies outside of the Park boundaries. The fortress lies between the tennis courts and the public golf course. A series of interpretive trails and boardwalks run through the remaining fortified sections and include construction facts, quotes, diagrams, and other information. The City's Greenway "Fortress Rosecrans" trailhead is also located here. The Old Fort Golf Club was established by the City in 1985 and was designed by Leon Howard and Denis Griffiths. The 18-hole golf course runs 6,859 yards with a Par score of 72. The course rating is 72.8 and it has a slope rating of 125. The facility also has two 8,000 sq ft putting and chipping greens and a clubhouse. Junior, beginner and intermediate classes can be taken at the facility. Private lessons are also available with the on-staff PGA instructor. There are three golf associations at the Club, the Men's Golf Association, Ladies' Golf Associate and the Senior League.