Maybe half a mile, if that. The trail to the lighthouse is maybe 1.5-2 miles, but it's a lot more difficult than it would seem. Lot's of elevation change.
Less than 2, from the road to the beach is pretty short. There are a few other trails connecting from the road if you want a longer hike though.
Down to the beach and back, pretty short. Not sure of mileage.
Thanks! Your answer is awaiting moderation.