Slot Canyon Atlas

AtlasSierra de Guara - Mascun

Gorgas Negras

verified Ungraded Extreme flood risk Rodellar, Huesca

The serious upper Alcanadre day: 3 hr approach, four rappels with the longest at 82 ft, then four-plus hours through swift narrows back toward Rodellar.

Treat as a full committing day. Start early in summer to clear the canyon before afternoon thunderstorms; an upstream storm here is not survivable in the slot. Confirm flow and weather the morning of.

Logistics

ManagerParque Natural de la Sierra y los CaƱones de Guara
PermitNo permit or registration required for individuals. Group cap 8 persons (excluding guide) per Decreto 204/2014. Neoprene mandatory (Gorgas Negras is named in the wetsuit-required list).
Distance~3.0 of approach hiking plus descent
Elevation~673 ft of approach gain
TimeFull day, 8-12 hr car to car
TechnicalRopewiki rates 4C2 IV. 4 rappels with the longest at 82 ft, swift water, 4.5-5 hr in-canyon descent. Optional 1.8 km shuttle. Long committing day on the upper Alcanadre.
SeasonApr-Oct
Flood riskExtreme. Long, committing, narrow, with no easy escape once committed; cancel on any storm forecast in the upper basin.
Vehicle access2WD to Rodellar, optional 1.8 km shuttle
CrowdLight compared to lower Alcanadre canyons; the 3 hr approach filters out casual parties
Coordinates42.2815, -0.1042

Sources