Atlas › Sierra de Guara - Formiga / Peonera
Formiga
verified
Ungraded
High flood risk
Bierge, Huesca
The Guara classic for first-time canyoneers with rope: short, scenic, three real rappels, jumps, slides, and a one-meter siphon, all wrapped around a 16th century cliffside ruin.
Watch for loose rock on the approach cliff above the descent. Rangers are usually present in summer to manage parking, not permits. The Dec-Jun closure is firm; do not bother trying outside the window.
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. Neoprene mandatory. Closed Dec 1 to Jun 30 (Formiga is named in the seasonal closure list together with Yara, up to the confluence). |
| Distance | 2.9 |
| Elevation | ~328 ft loss |
| Time | 2.5-4 hr |
| Technical | Ropewiki rates 3C II (v3a4 III). Three rappels with the longest at 33 ft, jumps up to 8 m, slides, swims, and one easy 1 m siphon. Conglomerate rock. A short via ferrata cable traverse passes the 16th century ruins on the approach. |
| Season | Jul-Nov (closed Dec 1 to Jun 30) |
| Flood risk | Moderate to High. Small basin but the conglomerate slot funnels flow. |
| Vehicle access | 2WD passenger car |
| Crowd | Extremely popular weekends. Commercial groups dominate Jul-Aug. Midweek or late afternoon is calmer. |
| Coordinates | 42.235, -0.2026 |