Mascún Superior

verified Ungraded High flood risk Rodellar, Huesca

The Guara emblem: a long day with a long approach, 11 rappels up to 115 ft, swift water, and limestone walls that make a strong case for being the best canyon in the range.

Plan the full day. Approach the put-in via the long uphill from Rodellar, descend the slot, exit back through the lower Mascun. Skill threshold is real: this is not a beginner trip. Cold water year round, full wetsuit mandatory.

Logistics

Manager	Parque Natural de la Sierra y los Cañones de Guara
Permit	No permit or registration required for individuals. Group cap 8 persons (excluding guide) per Decreto 204/2014. Minimum 10 minutes between groups. Neoprene mandatory (Mascun is named in the wetsuit-required list).
Distance	~3.0 RT
Elevation	~755 ft loss
Time	Full day, 6-9.5 hr
Technical	Ropewiki rates 4C1 III (v4a4 III). 11 rappels with the longest at 115 ft, swift water, long approach (2.5-3.5 hr) up to the put-in above Rodellar. Considered one of the most beautiful descents in Guara.
Season	Apr-Oct
Flood risk	High. Large basin, swift water, long committing slot.
Vehicle access	2WD to Rodellar
Crowd	Steady but the long approach thins the field; not a commercial conveyor
Coordinates	42.3221, -0.0621

Sources

park regulation: https://www.aragon.es/-/parque-natural-de-la-sierra-y-canones-de-guara
ropewiki: https://ropewiki.com/Mascun_(Upper)
wetsuit rule: https://montanaregulada.org/en/espacio-protegido/parque-natural-de-la-sierra-y-los-canones-de-guara
heroPhoto: https://commons.wikimedia.org/wiki/File:Masc%C3%BAn,_m%C3%A9andre_au_pied_de_Rodellar_(IMGP2836).JPG