The north end of Whidbey Island is accessible via SR 20 and the Deception Pass bridge or the Port Townsend/Keystone ferry. The south end is accessible via Mukilteo-Clinton ferry. Ferry schedules can be found online or by calling (206) 464-6400 (from Seattle), 1-888-808-7977 (WA only), or 1-800-84-FERRY (WA only) automated.
The spring weekend morning Mukilteo runs leave on the hour at 6, 7 and 8 am, and then every half hour until 8 pm, then hourly until 1:05 am. The Clinton runs start at 5:30 am, hourly until 7:30, then every half hour until 8:30 pm, hourly until 12:30 am.
Take exit 182 off of I-5 and head west. Stay on route 525 (Mukilteo Speedway) all the way to the ferry dock. Take the Mukilteo ferry (on route 525 west) and, arriving in Clinton, continue north on route 525 for 2.5 miles to the stoplight at “Ken’s Korners” just past milepost 11 (shopping center on right.) Turn left onto Cultus Bay Rd. and continue south for 3.8 miles and go down a steep hill. Turn right onto Bailey Rd. Follow 0.6 miles to the first left and turn onto Scatchet Head Rd. It winds and climbs to a Y. In 0.5 mi. Scatchet Head Rd goes off to the left as a dead end (don't take this). Curve right onto Swede Hill Rd. In 0.3 mi. Swede Hill Rd. goes past the entrance to the Scatchet Head Development and takes a hard right. Take that right, and Hathor Farm is the next driveway on your right, in the clearing.
(Anacortes/Deception Pass or Port Townsend/Keystone Ferry.)
Follow route 525 south along the island to the street light at the corner of Maxwelton Rd. between milepost 12 and 13. Turn Right on to Maxwelton Rd. In 6 miles you will be on Maxwelton Beach. Just past the dairy farm on the left is the intersection with Swede Hill Rd. Turn left onto Swede Hill and go up to the top of the hill. Hathor Farm is the first open space on the left, just past the horse arena at the top.