Dolomites Trail Infrastructure: Numbered Paths, Alta Via Routes, and Via Ferrata Networks

Administrative Structure

The Dolomites span five Italian provinces: Belluno (Veneto), Trento (Trentino), Bolzano (South Tyrol), Udine, and Pordenone (Friuli-Venezia Giulia). Trail maintenance responsibility follows provincial boundaries, which creates distinct administrative systems within the same geographic area.

In the autonomous Province of South Tyrol, trails are numbered by the provincial AVS (Alpenverein Südtirol) system, which uses different numbering conventions than the CAI system used in Veneto and Trentino. On the ground, trails crossing provincial boundaries carry both numbering systems, with signs typically displaying both designations.

CAI Numbered Paths

The majority of hiking paths in the Dolomites carry CAI route numbers. These are assigned and maintained by local CAI sections, which are responsible for annual inspections, waymarking, and repair following storm or rockfall damage. Signposts show the route number, destination, and time estimates based on a standard pace.

Path numbering in the Dolomites does not follow a single coherent sequence across the entire mountain group. Numbers are assigned locally and may repeat between different massifs. A path numbered 201 in the Pale di San Martino is unrelated to a path numbered 201 in the Brenta Dolomites. Route guidebooks and mapping services index paths by both number and massif to avoid ambiguity.

Alta Via Corridors

The Alta Via routes are long-distance traverses designed to link rifugi across the full length or breadth of the Dolomites. They were developed and documented in the 1960s and 1970s, with the first two — Alta Via 1 and Alta Via 2 — becoming the most widely followed.

Alta Via 1 runs from Lago di Braies (Pragser Wildsee) in the north to Belluno in the south, covering a horizontal distance of roughly 120 kilometres through the central Dolomites. The standard itinerary takes 8–10 days with overnight stays at rifugi. Technically, it remains a hiking route (EE classification for the most part) without requiring via ferrata equipment on the standard line, though some sections carry detour options onto more difficult terrain.

Alta Via 2 follows a more easterly corridor from Bressanone (Brixen) to Feltre, crossing higher and more remote terrain than AV1. Several sections pass through areas with limited hut availability, requiring careful planning for water and accommodation.

Via Ferrata Infrastructure

Via ferrata — literally "iron path" — refers to routes on steep rock that are equipped with fixed steel cables, iron rungs, ladders, and bridges. The Dolomites are considered the origin of the modern via ferrata concept. Many routes were originally installed during World War I to facilitate troop movement through vertical terrain; several historical installations in the Marmolada and Pasubio areas remain in use or have been restored.

Maintenance of fixed via ferrata infrastructure follows no single national standard. CAI sections, local municipalities, and in some cases private concession holders are responsible for different routes. The current condition of cables and anchors is not centrally reported; inspection by qualified individuals or reference to recent trip reports is the standard method for assessing route condition.

Via Ferrata Difficulty Levels

Italian via ferrata routes are graded on a scale from F (Facile / Easy) to EX (Estremamente Difficile / Extremely Difficult). The scale is applied inconsistently across guidebooks and regional sources, as there is no single standardised grading body. The most commonly referenced classification is:

• F — Facile: Short sections of fixed cable, mostly for psychological security on steep but non-technical terrain
• PD — Poco Difficile: Moderate exposure, cables used actively for progress on sections of 50–70° rock
• D — Difficile: Sustained vertical sections, full use of cable required, significant exposure
• TD — Molto Difficile: Near-vertical or overhanging sections, physically demanding
• ED / EX — Extreme grades found on specialised routes; comparable to multi-pitch climbing in physical demand

The Tre Cime di Lavaredo Zone

The Tre Cime di Lavaredo (Drei Zinnen in German) in the Sesto Dolomites represents one of the most concentrated zones of both trail and via ferrata infrastructure in the entire range. The circular path around the three summits — trail 101 — is one of the most frequently walked routes in the Alps, typically completed in 3–4 hours. The surrounding area contains a network of paths connecting Rifugio Auronzo, Rifugio Lavaredo, and Rifugio Antonio Locatelli (Dreizinnenhütte), all accessible without major technical difficulty.

A vehicle access road runs from Misurina to Rifugio Auronzo (2333m), which significantly increases visitor numbers during the July–August peak. The Sesto Dolomites CAI section manages trail maintenance for the immediate area, with cooperation from the South Tyrol provincial authority for routes crossing the provincial boundary.