Irvine Ranch Open Space Patrol Irvine Ranch Open Space Patrol Activity Details Date: Monday, October 23, 2017 Time: 8:00 am - 2:30 pm Duration (hours:minutes): 6:30 Type: Trail Work Organization: OC Parks Area: Limestone Canyon Nature Preserve Staging Area: Augustine Difficulty: 1 Minimum Age: 12 Email Activity to Friend Registration is closed for this activity..