Inaxos

verified ACA 3C III Moderate flood risk Nestani, Arcadia

Forty rappels through the north flank of Mount Artemisio, draining to the river Inahos and out to the Argolic Gulf.

Approach is a 10 min, 600 m downslope hike from parking. Emergency exits exist but cross rough terrain. The Nestani road is asphalted and the cleanest access; tracks from Karia and Neohori add time and difficulty. Drains a karst system, so springs can change the character of the descent year to year.

Logistics

Manager	Open-access Greek public land, no managing reserve
Permit	No permit required, no restrictions
Time	6-8 hr descent, plus 10 min approach and 1 min exit
Technical	About 40 rappels in four roughly equal sections, mostly 5-7 m with several 15 m drops, longest 35 m. Significant swift-water hazard from numerous underground springs feeding the canyon mid-descent. The final 30 m rappel can develop a siphon at higher flow. ACA grade 3C III (v3a3 IV).
Season	Summer, when the river is dry most of the year
Flood risk	Moderate: underground springs raise water mid-descent regardless of weather; final-section siphon hazard increases sharply on any recent storm in the upper basin.
Vehicle access	Passenger car to parking on asphalted road from Nestani; routes via Karia rougher.
Crowd	Local Greek canyoneering community, light international traffic
Coordinates	37.630895, 22.494162

Inaxos

Logistics

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