Hopefully this post will help someone else get their Duty Free. I told him he missed it and there was no way to turn around now. Once we left and were back in the lineup to pay our boarder crossing fee ($3.50), the car next to us rolled down his window and asked if the Duty Free was past this toll. Book a tour to climb the 94 iron stairs to the top of the lighthouse. Fort Gratiot Lighthouse is Michigan’s oldest lighthouse with a history dating as far back as the 1820s and today it still operates, guiding sailors between Lake Huron and the St. There was 1 other person in the Duty Free. Fort Gratiot Lighthouse2802 Omar St, Port Huron, MI 48060. We complained there was no signage, and clearly she must hear that daily as she said 'she isn't in charge of signage'. We took the wrong turn and a woman at a booth in the Duty Free parking lot was waving frantically at us. Honestly - it's like they don't want anyone to find this place. There will be a 'gated arm' entrance to the duty free just past that on your left. Take the first left (at the lights) and then PASS the left turn to the Canada bridge.
Before you even get to the bridge, take exit 275 (Port Huron). You will see a large billboard stating a sale on whiskey, just not how to get there. If you want Duty Free - don't expect ANY signage.
Came back into Canada via the Bluewater Bridge.
