[1] In February 2016, IBGE slightly revised again the official altitude of Pico 31 de Março to 2,974.18 metres (9,757.8 ft), a 1.52-metre difference.

[1] The Neblina massif is a glaciated tor[citation needed] composed of a tilted block of sandstone overlying Precambrian metamorphic rocks.

Due to its equatorial latitude, while it can be cold on top, sub-freezing temperatures and frost appear to be rare (no permanent measurements are undertaken), and there is no snow.

One non-authoritative source gives an average temperature of 20 °C (68 °F) during the day and 6 °C (43 °F) at night for nearby Pico da Neblina.

The permit can be obtained at ICMBio's office in São Gabriel da Cachoeira, but all climbers must take an accredited local guide.

Therefore, climbers are advised not only to take the utmost precaution in avoiding insect bites, but also to discuss preventive and/or therapeutic strategies with their physicians.