9:30 am to about 3:30 pm, with 1/2 hour or so for lunch. Finishing time depends on work needs & group size.
Boat ramp parking lot adjacent to Ferguson Road Trailhead on the west side of Ferguson Rd. just north of the long bridge over Slough Creek. Signage along Ferguson Road indicates Perry Lake Hiking Trail Access. Address for Google Maps: 5425 Ferguson Road, Oskaloosa, KS 66066