Reef Bay Sugar Mill

From Centerline Road, the trail descends roughly three miles to the mill. It is steep in places, uneven and rocky, and can be slippery even when dry; the way out climbs about 900 feet. Visitors often say the hot, humid return feels harder than the descent, so don't judge the hike by the downhill leg. Bring water and food for the long day.

The mill started with animal power and converted to steam sometime after 1861. Large parts of the steam engine remain, and interpretive signs explain how the factory worked. The rusted rollers and machinery beside the walls make the scale easier to picture. For a useful photo, include both the machinery and some of the factory around it.

Reef Bay was St. John's last mill still in operation; sugar production continued into the early 1900s and ended after a fatal accident in 1908. The factory belongs to an island plantation economy built on enslaved labor, and its production continued long after slavery was abolished in the Danish West Indies. Keep that longer history in mind alongside the machinery.

On the hike in, a side spur leads to carvings in blue basalt at the base of the valley's highest waterfall. The petroglyphs connect the valley to St. John's pre-Columbian past. They're a separate stop from the mill, but add an earlier layer of history to the same long visit; save some energy if you want to see both.