Another way to and from Raptor Ridge is to start at Arroyo Park and continue south on the Interurban Trail, then turn left (uphill) on the trail marked for Lost Lake. Follow this 0.6 mile to where the trail merges left onto an abandoned gravel road. In 0.1 mile come to a signed junction next to a swamp. You'll take the left (straight ahead) branch, recently named the Hemlock Trail. Follow this for about 2 miles, first on abandoned road and then on a fairly new trail, to a small sign directing you to Raptor Ridge.
Return the same way unless you want a road walk for 2 miles from the base of the Pine-Cedar Lakes Trail back to Arroyo Park.