From Hwy 29, and/or Hwy 121, take Hwy 116/Lakeville Highway and proceed west all the way to "D" street in Petaluma.

Turn left on "D" street, which will become the Point Reyes/Petaluma Road once you leave Petaluma. On this road, follow the signs to Point Reyes Station (half hour’s drive).

On the way, you will pass Novato Blvd., the Cheese Factory, Nicasio Valley Road. Continue until you come to a stop sign just pass the reservoir.

Turn right and cross a small cement bridge covered with graffiti, and proceed 3 miles to the next stop sign.

At the stop sign, turn left onto Route One/Shoreline Hwy. You’ll pass through the town of Point Reyes Station. As you leave town, immediately after passing over a green bridge, turn right heading towards "Inverness" (this is Sir Francis Drake Blvd., but the road sign is often missing). Continue a little over one mile, and look for a green city sign saying: Inverness Park.

Just around the next bend, you'll be taking a left onto Vallejo Avenue. Busy Bee Bakery and the Inverness Park Grocery/Perry's deli are located on the corner. The Blackthorne Inn is located at 266 Vallejo Avenue almost at the end of the road on the right hand side. We have a fairly steep driveway, with five parking spots available, including the steep paved area.