Grigno
not verifiedpermit unconfirmed 2026-08-19
Ungraded
Extreme flood risk
Grigno, Trentino-Alto Adige
Sustained dark limestone gorge above Grigno town, 15 rappels under 2000 liter-per-second flow, one of the most committing technical descents in Italy.
Check the gauge before going; above 2.6 the canyon becomes a high-flow trap with hydraulic risk. Wetsuit mandatory, dark gorge means cold water and no warming sun. Bolts well-maintained on the classic line but verify with local club (Trentino canyoning association) before going.
Logistics
| Manager | Provincia Autonoma di Trento |
|---|---|
| Permit | RopeWiki's Red Tape section is empty and its infobox carries no Permits field, so access here is unverified rather than confirmed free. |
| Distance | 2.2 |
| Elevation | ~722 ft loss |
| Time | 4-6 hr (descent about 3.5 hr) |
| Technical | Locally known as Bus del Diavolo (Devil's Hole). 15 rappels, longest about 82 ft. Deep dark limestone gorge in the Valsugana, average flow around 2000 L/s and the canyon goes very aquatic above a gauge reading of 2.6. Ropewiki rates 4C2 III R (v5a5 V). Swift water is the primary hazard, and for two-thirds of the descent no direct sunlight reaches the canyon floor. |
| Season | Jun-Sep |
| Flood risk | Extreme. The canyon is essentially unsafe above the 2.6 m gauge reading; flow surges with any thunderstorm in the Valsugana. Sustained 2000 L/s baseline means there is no calm water. |
| Vehicle access | 2WD, SS 47 from Trento along the Valsugana valley toward Padova |
| Crowd | Light, technical descent for experienced parties only |
| Coordinates | 46.0174, 11.6359 |