Attn Agents, Follow Detours In Castle Pines As Monarch Blvd Is Closed North Of Castle Pines Blvd Through September. From I-25 Take Exit 188 Turn West On Castle Pines Blvd, Continue To Roundabout, Take The First Exit On Buffalo Trail, Turn Right On Monarch Turn Left On Hidden Pointe Blvd, Turn Left On Crossing Circle Rt On Thorn Apple Dr., Rt On Thorn Apple Way.