PR1 SMI - Sete Cidades Caldera Loop

The PR1 SMI trail begins at the Vista do Rei viewpoint, reached by car or taxi from Ponta Delgada in about 25 minutes; a bus service from Ponta Delgada to Sete Cidades village can also be combined with a short uphill walk to the trailhead, and free parking is available at the viewpoint. No permit is required. Covering 12.5 km as a loop with roughly 500 m of cumulative elevation gain, the route is rated moderate: the initial descent from the crater rim drops steeply on packed dirt and cobbled sections before levelling out around the lake shore, and the return climb back to Vista do Rei is the most sustained uphill stretch. Surface underfoot alternates between compacted earth, short paved stretches near the village of Sete Cidades, and muddy patches after rain; shade is limited on the rim sections but increases near the lakeshore among hydrangea hedges and eucalyptus. Exposure is minimal since the path follows established tracks, though the crater-rim viewpoints have unfenced drops that warrant care in wind or wet conditions. Landmarks include the Vista do Rei hotel ruin, the twin Lagoa Verde (Green Lake) and Lagoa Azul (Blue Lake) separated by a narrow land bridge, the twin-domed São Nicolau church, and several miradouros overlooking both lakes at once. Hikers with less time can turn around at the lakeshore bridge for a shorter out-and-back of about 8 km. There are no refuge huts on the route, but Sete Cidades village has cafés and public toilets roughly at the halfway point, the practical spot to refill water bottles. No natural water source along the trail is safe to drink untreated, so hikers should carry all the water they need. The loop sits within the Sete Cidades protected landscape on São Miguel, and its combination of caldera scenery and manageable distance makes it one of the most popular day hikes in the Azores.