To Reach 9573 Castle Ridge Circle From Co-470, Follow These Directions: Exit Co-470 At Lucent Boulevard. Head South On Lucent Boulevard. Turn Right Onto Highlands Ranch Pkwy. Turn Right Onto Foothills Canyon Blvd. Turn Left Onto Whitecliff Way. Turn Right Onto Castle Ridge Circle. Proceed To 9573 Castle Ridge Circle, Which Will Be On Your Left.