Trails · Hard

Mistérios Negros

A hard circular climb through the bare black lava domes of Mistérios Negros, with a lava tunnel to explore at the finish.

TerceiraOfficial trail code PRC01TEROfficial trail status: Status unknownUpdated 18 October 2026
Lagoa do Negro, a dark crater lake on Terceira.

Photo: Vitor Oliveira from Torres Vedras, PORTUGAL · CC BY-SA 2.0

This loop climbs through the Natural Reserve of Serra de Santa Bárbara and Mistérios Negros, starting on a road lined with common heather and Japanese cedar before entering open pasture and then a belt of endemic shrubland, Azorean heather, Azores juniper, Azorean blueberry and cape myrtle.

The path passes the three small Lagoinhas do Vale Fundo lakes, then crosses the black, bare trachytic domes left by the 1761 eruption, the trail's defining landscape, with views at the high point toward Pico Gordo, the island's central massif and Pico do Gaspar. It descends through a Japanese cedar wood bordered by pasture, past the geodetic pillar of Pico da Cancela, with an optional side trip to Pico do Gaspar, before returning on a forest road to the start, where the Gruta do Natal lava tunnel is worth a look.

It's rated hard despite covering only about 5 km in roughly two and a half hours, because the terrain is rough and the route climbs and drops around 170 m across bare lava and dense shrub rather than open ground.

Elevation · from the official GPX

Up and down the trail

Hover or drag along the chart — the dot follows on the map.

gentle < 8%steady 8–15%steep > 15%+173 m up · −172 m down · 543 m → 646 m

Plan your walk · MET Norway & IPMA

When to go

Pick a start time. We forecast where you'll be each hour — 543 m at the lowest point, 646 m at the top.

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Official facts, our words

What to know

Start & finish
Lagoa do Negro
Safety
The bare lava domes are rough and uneven underfoot, and this is high, exposed ground where cloud and fog can close in fast, so check the forecast and turn back if visibility drops. If you detour into the Gruta do Natal lava tunnel, bring your own light and sturdy shoes.
When to go
Only one of the three Lagoinhas do Vale Fundo lakes holds water year-round, and that's when it draws passing migratory birds, so it can be worth a second look outside the usual hiking season.

The route

TrailheadHigh point500 m
Directions

Trail facts

Difficulty Hard
Length
5.2 km
Duration
2 hr 30 min
Elevation gain
173 m
Route
Circular
Highest point
646 m
Steepest descent
17% at km 3.3
Start
Lagoa do Negro
Finish
Lagoa do Negro
Permit
Not required
Trail code
PRC01TER

Route and facts © Azores trails network (visitazores.com)

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