{"id":100625,"date":"2026-07-29T04:32:51","date_gmt":"2026-07-29T04:32:51","guid":{"rendered":"https:\/\/www.s1trail.com\/sentieri-cai-carso\/"},"modified":"2026-07-29T08:43:16","modified_gmt":"2026-07-29T08:43:16","slug":"sentieri-cai-carso","status":"publish","type":"page","link":"https:\/\/www.s1trail.com\/en\/sentieri-cai-carso\/","title":{"rendered":"The CAI trails of the Karst \u2014 the network behind the Corsa della Bora"},"content":{"rendered":"
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TRAIL NETWORK<\/span><\/p>\n\n\n

The CAI trails of the Karst \u2014 the network behind the Corsa della Bora<\/h1>\n\n\n\n

Numbers, official names and 2027 races: the network of CAI trails behind the routes of the Corsa della Bora.<\/p>\n<\/div><\/div>\n\n\n\n

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The Trieste Karst is crossed by a dense network of trails numbered and maintained by the Club Alpino Italiano (CAI)<\/strong>, Trieste branches. Each route is identified by a three-digit number (sometimes followed by a letter, e.g. CAI 001a<\/strong>) and marked on the ground with the classic white-red-white trail blaze<\/strong>, painted on trees, rocks and posts, alongside the trail number; at the main junctions there are signposts with destinations and walking times. The official, up-to-date list of trails, with routes and technical sheets, is published in the CAI FVG trail register \u2014 Sector 0 Karst<\/a>.<\/p>\n\n\n\n

The routes of the Corsa della Bora largely rely on this network, alternating stretches on CAI trails with short race-specific connectors<\/strong> \u2014 stretches not numbered by CAI, marked on the spot by the organisers with tape and dedicated signage. A trail never \u201cbecomes\u201d another: the route joins it<\/strong>, leaves it<\/strong>, crosses it<\/strong> or shares it for a stretch<\/strong>, before continuing on a race connector or a different trail.<\/p>\n\n\n\n

The CAI trails touched by the 2027 races<\/h2>\n\n\n\n

The table lists the CAI trails in Sector 0 Karst covered by the 2027 Corsa della Bora distances, with the places they cross and the races that use them. Proper names exist only for some trails: where the CAI register does not assign a title, the trail is identified by its number alone.<\/p>\n\n\n\n

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CAI trail<\/th>Official name<\/th>Places crossed<\/th>Races that use it<\/th><\/tr><\/thead>
CAI 001<\/td>\u2014<\/td>Crogole, Bottazzo\/Bota\u010d, Basovizza\/Bazovica, San Lorenzo\/Jezero, Obelisco di Opicina\/Op\u010dine, Bosco del Bovedo, Barcola\/Barkovlje, Miramare\u2013Contovello\/Kontovel, Aurisina Cave, Sistiana\u2013Duino\/Devin, Santa Croce\/Kri\u017e<\/td>S1 Trieste Ultra, S1 Bora Ultra, S1 TransKarst Ultra, S1 Family Hike & Trail, S1 Half Trail, S1 Borderless Trail<\/td><\/tr>\n
CAI 001a<\/td>Sentiero del Mitreo<\/td>Duino\/Devin, Grotta del Mitreo (Mitreo di Duino)<\/td>S1 Bora Ultra, S1 TransKarst Ultra, S1 Family Hike & Trail, S1 Half Trail, S1 Borderless Trail<\/td><\/tr>\n
CAI 003<\/td>Alta Via del Carso<\/td>Bosco Flondar, Casali Flondar, Jamiano\/Jamlje, settore transfrontaliero del Monte Ermada\/Grmada, Grotta del Motore, Grotta D\u00f6rfler, Monte Sambuco\/Bezgonov vrh, rientro dal confine sloveno verso Precenico<\/td>S1 Bora Ultra, S1 TransKarst Ultra, S1 Half Trail, S1 Borderless Trail<\/td><\/tr>\n
CAI 003a<\/td>\u2014<\/td>Medeazza\/Medjavas, Case Coisce\/Kohi\u0161\u010de<\/td>S1 Bora Ultra, S1 TransKarst Ultra, S1 Half Trail, S1 Borderless Trail<\/td><\/tr>\n
CAI 008<\/td>\u2014<\/td>Duino Stazione (abitato protostorico), settore del Monte Ermada<\/td>S1 Family Hike & Trail, S1 Half Trail<\/td><\/tr>\n
CAI 009<\/td>\u2014<\/td>Miramare\u2013Contovello\/Kontovel<\/td>S1 Trieste Ultra, S1 Bora Ultra<\/td><\/tr>\n
CAI 010<\/td>\u2014<\/td>San Pelagio\/\u0160empolaj, Prepotto, Fornace di Aurisina, Santa Croce\/Kri\u017e<\/td>S1 Bora Ultra, S1 TransKarst Ultra, S1 Borderless Trail<\/td><\/tr>\n
CAI 012<\/td>Sentiero Nicol\u00f2 Cobolli<\/td>Monte Gurca<\/td>S1 Trieste Ultra, S1 Bora Ultra<\/td><\/tr>\n
CAI 015<\/td>\u2014<\/td>Hervati\/Hrvati, Val Rosandra\/Dolina Glin\u0161\u010dice<\/td>S1 Trieste Ultra, S1 Bora Ultra<\/td><\/tr>\n
CAI 023<\/td>Trail Tiziana Weiss<\/td>Borgo San Mauro\u2013PortoPiccolo, Santa Croce\u2013PortoPiccolo<\/td>S1 Trieste Ultra, S1 Bora Ultra, S1 TransKarst Ultra, S1 Borderless Trail<\/td><\/tr>\n
CAI 032<\/td>\u2014<\/td>Precenico, San Pelagio\/\u0160empolaj<\/td>S1 Bora Ultra, S1 TransKarst Ultra, S1 Borderless Trail<\/td><\/tr>\n
CAI 033<\/td>\u2014<\/td>Duino\/Devin, Medeazza\/Medjavas, Visogliano\/Vi\u017eovlje<\/td>S1 Bora Ultra, S1 TransKarst Ultra, S1 Family Hike & Trail, S1 Half Trail, S1 Borderless Trail<\/td><\/tr>\n
CAI 035<\/td>\u2014<\/td>Fornace di Aurisina, Parco Lupinc<\/td>S1 Bora Ultra, S1 TransKarst Ultra, S1 Borderless Trail<\/td><\/tr>\n
CAI 039<\/td>\u2014<\/td>Tra Val Rosandra e Bottazzo\/Bota\u010d<\/td>S1 Trieste Ultra, S1 Bora Ultra<\/td><\/tr>\n
CAI 044<\/td>Sentiero Ressel<\/td>Basovizza\/Bazovica<\/td>S1 Trieste Ultra, S1 Bora Ultra<\/td><\/tr>\n
CAI 046<\/td>\u2014<\/td>Bagnoli della Rosandra\/Boljunec, Crogole\/Kroglje<\/td>S1 Trieste Ultra, S1 Bora Ultra<\/td><\/tr>\n
CAI 075<\/td>\u2014<\/td>Jamiano\/Jamlje\u2013Issari\/Hi\u0161arji, zona di Bonetti\/Boneti e Quota 208 Sud<\/td>S1 Bora Ultra, S1 TransKarst Ultra<\/td><\/tr>\n
CAI 079<\/td>Sentiero Abramo Schmid<\/td>Issari\/Hi\u0161arji, Monte Kremenjak, Quota 219\/\u0160pik, zona di confine italo-slovena<\/td>S1 Bora Ultra, S1 TransKarst Ultra<\/td><\/tr>\n<\/tbody><\/table><\/figure>\n\n\n\n

S1 Bora Ultra (116 km)<\/strong> is the concatenation of the two longer routes \u2014 the S1 Trieste Ultra (61 km) in the first part and the S1 TransKarst Ultra (55 km) in the second \u2014 and for this reason touches practically every trail in the table except CAI 008, reserved for the Family and Half variants.<\/p>\n\n\n\n

Non-CAI itineraries crossed by the route<\/h2>\n\n\n\n

Along the way, the Corsa della Bora also crosses some well-known local itineraries that are not part of the CAI numbering<\/strong>: they are independent itineraries, with their own signage and their own history, which in some stretches simply share the same trackbed as the CAI trails listed above. They are not equivalent names or synonyms of the CAI trails: sharing a stretch does not make the two itineraries the same thing.<\/p>\n\n\n\n