In <a href="kavval://level1AdminAreas/766a3a12-4ebf-42f0-a8b5-b1736b5e601d" rel="noopener noreferrer" target="_blank">Istria</a>, people have been hunting for the white truffle in the undergrowth around <a href="kavval://cities/5ae903bd-2092-46c2-a234-8d70f16d8b5b" rel="noopener noreferrer" target="_blank">Motovun</a> for ages—and since 2013, they’ve been hunting bibs too 🎟️. ISTRIA 100 by UTMB® has planted its spikes on the <a href="https://en.wikipedia.org/wiki/Istria" rel="noopener noreferrer" target="_blank">Istrian peninsula</a>, that triangle of <a href="kavval://countries/0822b1dd-f735-486f-8268-50a695f3c055" rel="noopener noreferrer" target="_blank">Croatian</a> land set on the <a href="kavval://places/dbada071-619f-4b71-ba9f-f8dfd8634d98" rel="noopener noreferrer" target="_blank">Adriatic</a>, between Venetian hills and perched medieval towns 🏔️. This major&nbsp;<a href="kavval://pages/19c6236d-b5b7-431a-87ba-e50b74dcd383" rel="noopener noreferrer" target="_blank">trail</a>&nbsp;&gt;event now holds a prime spot on the <a href="kavval://series/75e5b883-d6b6-4508-b500-ea23de2d6c87" rel="noopener noreferrer" target="_blank">UTMB World Series</a> circuit and brings together more than 3,000 runners from all over the world. <a href="https://en.wikipedia.org/wiki/Croatia" rel="noopener noreferrer" target="_blank">Croatia</a>, the month of <a href="kavval://pages/071be5e9-04a8-4d1b-b619-77ef92e45b55" rel="noopener noreferrer" target="_blank">April</a>, <a href="kavval://tags/5bc4ab8e-733a-4740-8184-ba6b13714b33" rel="noopener noreferrer" target="_blank">seaside</a>: it’s enough to make your mouth water 😋.Back to 2013, when the race arrived as a&nbsp;low-key trail 🗓️. It was built for a handful of die-hards, ready to roam the Istrian backcountry far from the spotlight. As the editions rolled on, the race grew and expanded its menu of distances, boosted its numbers, and gained prestige—until it joined the big <a href="https://utmb.world" rel="noopener noreferrer" target="_blank">UTMB®</a> family ✨. Today, ISTRIA 100 by UTMB® hands out its precious&nbsp;<a href="kavval://pages/12e0c222-3cac-4fd6-961e-3002d0a0ceec" rel="noopener noreferrer" target="_blank">Running Stones</a>, those keys that open the doors to the trail final at the foot of <a href="kavval://events/6bf47aa3-2939-4186-89bf-1ade262fe679" rel="noopener noreferrer" target="_blank">Mont Blanc</a> 💎. From a small regional secret to an international stop on the&nbsp;<a href="kavval://pages/19c6236d-b5b7-431a-87ba-e50b74dcd383" rel="noopener noreferrer" target="_blank">trail</a>&nbsp;calendar, the trajectory commands respect 🫡.The flagship route is the 168K and serves up a real&nbsp;best-of&nbsp;of <a href="https://en.wikipedia.org/wiki/Istria" rel="noopener noreferrer" target="_blank">Istria</a> 📍. Start from old <a href="https://en.wikipedia.org/wiki/Labin" rel="noopener noreferrer" target="_blank">Labin</a>, a 3,000-year-old town clinging to its hill, then climb <a href="https://en.wikipedia.org/wiki/Učka" rel="noopener noreferrer" target="_blank">Učka</a>, the region’s highest summit, with a plunging view over the <a href="https://en.wikipedia.org/wiki/Kvarner_Gulf" rel="noopener noreferrer" target="_blank">Kvarner Gulf</a> ⛰️. The route then heads towards <a href="https://en.wikipedia.org/wiki/Buzet" rel="noopener noreferrer" target="_blank">Buzet</a>, before diving inland: deep <a href="kavval://tags/e1d7f6d9-6a3f-4a71-821b-1b197592de44" rel="noopener noreferrer" target="_blank">forests</a>, canyons, streams to cross, technical singletrack, and medieval villages including <a href="https://en.wikipedia.org/wiki/Motovun" rel="noopener noreferrer" target="_blank">Motovun</a>, the famous Istrian jewel ⚡️. A hint of&nbsp;<a href="https://en.wikipedia.org/wiki/Coasteering" rel="noopener noreferrer" target="_blank">coasteering</a>, some ankle-breaking sections, a few runnable stretches to catch your breath... the terrain changes face every kilometer 🤙. The finish is earned on the seafront in <a href="https://coloursofistria.com/en/activities/the-best-beaches-in-umag" rel="noopener noreferrer" target="_blank">Umag</a>, after a complete crossing of the peninsula, east to west 🧭.And speaking of terrain, ISTRIA offers something for every pair of calves, with five distances laid out like a fine staircase. At the very top sits the 168K and its 6,800 mD+, the weekend’s monster with a late-afternoon <a href="kavval://tags/98933fbd-c93b-4597-853a-c6e90e01655d" rel="noopener noreferrer" target="_blank">night</a> start—never to be taken lightly 😅. One step down, the 110K with 4,200 mD+ takes off from Buzet at dawn and then merges onto the route of the 168K to go tickle the highest Istrian peaks 🏞️. The 69K forges its way through the heart of central Istria, from <a href="https://villsy.com/blog/butoniga-istria-163/" rel="noopener noreferrer" target="_blank">Lake Butoniga</a> to the lanes of <a href="https://www.istra.hr/en/destinations/motovun" rel="noopener noreferrer" target="_blank">Motovun</a>, <a href="https://en.wikipedia.org/wiki/Oprtalj" rel="noopener noreferrer" target="_blank">Oprtalj</a>, <a href="https://en.wikipedia.org/wiki/Završje,_Istria_County" rel="noopener noreferrer" target="_blank">Završje</a> and <a href="https://en.wikipedia.org/wiki/Grožnjan" rel="noopener noreferrer" target="_blank">Grožnjan</a>: a tough format, perfect for moving up a rung before aiming higher 🤓. More accessible is the 42K totaling 1,000 mD+. It starts at the foot of Motovun, climbs toward Grožnjan, and reaches the seafront of Umag. There’s also the 21K, starting from Grožnjan, for a first taste of trail—flowy, to be taken gently 🧘‍♀️. From 100 miles to a discovery format, everyone matches their distance to their ambitions.But what’s its big special feature? 🤔 This event spans a whole weekend, with staggered starts from four different towns! You’ve got Labin, Buzet, Motovun and Grožnjan depending on your distance 📍. The 168K drops into the night from the moment the gun goes, headlamp strapped on and Adriatic stars as your only audience ✨. And don’t worry: Istrian spring keeps a few surprises in store—muddy ground after rain, swollen streams, ever-present rock, and fickle weather between sea and <a href="kavval://tags/58c16ed9-f7c2-4d12-ae52-920f5f7428f3" rel="noopener noreferrer" target="_blank">mountain</a> ⛰️. It might sound scary, but I promise it’s doable—and above all, it’s worth it! Especially with the atmosphere, which blends international fervor and Balkan warmth, in a vibe that’s both demanding and good-natured—just what you need 🤩.Once the medal is around your neck, Istria unveils its other talent: the table 🍽️. <a href="https://croatia.hr/en-gb/culture-and-arts/the-hidden-treasure-of-istria-the-record-breaking-great-white" rel="noopener noreferrer" target="_blank">Motovun white truffle</a>, award-winning <a href="https://croatia.hr/en-gb/food-and-drink/olives-and-olive-oil" rel="noopener noreferrer" target="_blank">olive oil</a> and melting&nbsp;<a href="https://croatia.hr/en-gb/croatia-feeds/this-meat-is-so-delicious-because-it-is-made-by-the-wind" rel="noopener noreferrer" target="_blank">pršut</a>: the post-race aid station feels like a feast 🍝. After that, one tip: go to Grožnjan after your efforts—even if you passed through it—this tiny artists’ town perched on its hill deserves to be admired. Or wander the lanes of Motovun to digest the effort in full postcard mode 📸.Between spicy elevation gain and fragrant truffles, ISTRIA 100 by UTMB® fills up your legs as much as your stomach. Your move—play the right card 😉.

Istria 100 by UTMB®

168K

110K

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Istria 100 by UTMB® results

Last event : 2025

168.6 km

110 km

69.2 km

42.1 km

21.4 km

168K

110K

69K

42K

21K

Previous results