Inaxos

not verifiedpermit verified 2026-08-19 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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