Kainuu Trail Hossa National Park
Kainuu Trail 78 k Julma-Ölkky
Hossa (Suomussalmi)
Race guide
Updated 19 July 2026
The Kainuu Trail 78k Julma-Ölkky is a long-distance trail race set entirely within Hossa National Park near Suomussalmi in the Kainuu region of northeastern Finland. Covering 78 kilometres on a point-to-loop route that starts and finishes at the Hossa Visitor Centre, the race is defined not by dramatic mountain climbing — total ascent is a remarkably flat 35 metres D+ with a high point of just 274 metres — but by the relentless technical nature of Finnish forest and lakeland terrain: rooted singletrack, boggy sections, exposed rock slabs, and the sheer accumulative effort of 78 kilometres on your feet in subarctic wilderness. Despite its modest elevation profile, the Julma-Ölkky is no pushover. The distance, the remote mid-race stretch between Jatkonvaara (CP2 at 21 km) and Värikallio (CP3 at 55 km), and the real cut-offs — CP3 by 19:00 Saturday, finish by 23:00 Saturday — demand genuine respect for pacing and self-sufficiency. Runners who underestimate the terrain because the climb figures look easy often find themselves in serious difficulty on the back half.
Course & Terrain
The route loops out from the Hossa Visitor Centre (270 m) through some of the most pristine boreal forest in Finland. The first checkpoint, Huosius, arrives at 10 km (273 m) after an opening leg on classic Hossa singletrack — pine and spruce forest with rooted, often narrow trails that punish anyone trying to run faster than the ground allows. Jatkonvaara at 21 km (262 m) marks the end of the early section and the beginning of the longest unsupported stretch of the race. From CP2 to CP3 is 34 kilometres with no formal checkpoint — this is the defining section of the Julma-Ölkky. The terrain throughout Hossa National Park alternates between dry ridgeline paths, wet forest floor, wooden boardwalks over boggy ground, and occasional rocky outcrops. Given that the entire course sits between 259 m and 274 m above sea level, you are dealing with a genuinely flat race in topographic terms, but the technical footing means real pace is rarely achievable. Expect to work hard for every kilometre.
The Decisive Section: CP2 to Värikallio
The 34-kilometre gap between Jatkonvaara (CP2, 21 km) and Värikallio (CP3, 55 km) is where the Julma-Ölkky is won and lost. There is no crew access, no additional aid, and no checkpoint to reset mentally or physically. Runners must carry sufficient nutrition, hydration, and kit to cover this distance independently. The cut-off at Värikallio is 19:00 Saturday, so depending on start time, any runner who has been moving too cautiously or has suffered early issues must urgently audit their pace by Jatkonvaara at the latest. The back half of this section — roughly kilometres 40 to 55 — tends to be where the flat-but-technical terrain starts to accumulate real fatigue. Root impacts on ankles, the cognitive load of constant technical footing, and the psychological weight of a long unsupported stretch combine into something much harder than the elevation data suggests. Naming the race after Julma-Ölkky, a dramatic dark canyon lake within the park, is a reminder that this landscape has genuine character, even without high peaks.
Pacing Strategy
The flatness of the Kainuu Trail 78k is a trap. Runners accustomed to using climb and descent as natural pace governors must impose their own discipline here. Without hills to force a walk, it is easy to run too hard in the first 21 kilometres to Jatkonvaara and arrive at the long middle section already degraded. A controlled, genuinely conservative early effort — treating Huosius at 10 km as nothing more than a brief check-in rather than a first milestone — is the correct approach. Work backwards from the cut-offs: you must reach Värikallio (55 km) by 19:00 Saturday and finish (78 km) by 23:00 Saturday. That final 23-kilometre leg from CP3 to the Visitor Centre has a four-hour window, which sounds comfortable but assumes a runner who is moving reasonably well at 55 km. Build in buffer, not complacency. Walking sections proactively through the roughest rooted terrain — rather than reactively when legs are broken — will pay dividends in the back quarter.
Fuelling & Hydration
With crew access only at the start and finish (Hossa Visitor Centre), and formal aid only at Huosius (10 km), Jatkonvaara (21 km), and Värikallio (55 km), runners must be self-sufficient for the 34-kilometre CP2-to-CP3 section. This is the key planning constraint for drop bags and vest loading. Carry enough calories and fluid for at least four to six hours of independent movement depending on your expected pace, and do not rely on finding potable water in the forest without filtering capability. In boreal forest conditions, sweat rates can be lower than in warmer races, but do not mistake cool air for licence to underdrink — cumulative dehydration over 78 kilometres on technical terrain will degrade both motor control and decision-making, both of which matter acutely on rooted singletrack. Front-load a solid feed at Jatkonvaara before the long gap begins; this is your last guaranteed resupply point for roughly a third of the total race distance.
Conditions to Expect
Hossa National Park in the Kainuu region experiences a subarctic continental climate. Race day conditions can range from warm, humid summer weather with significant insect pressure — mosquitoes and horseflies are a genuine factor in Finnish forest racing — to cool, overcast, and damp conditions that make rooted terrain even more treacherous. Check the forecast carefully and prepare for both eventualities; a light wind shell and insect head net can be as important as nutrition in your pack. Daylight is generous in Finnish summer, but depending on start time and pace, slower runners may encounter dusk or early darkness in the final kilometres, particularly if approaching the 23:00 finish cut-off. A head torch is prudent kit regardless of forecast sunset time. The terrain in Hossa is genuinely wild — this is a national park, not a manicured trail network — so expect the forest floor to be variable in quality and the trail markings to require active attention, especially in the long middle section far from checkpoints.
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✓ Course data verified against the official source (2026-07-05) · official source
0 km · 270 m · —
8.8 km · 273 m · Sat 08:00
18.5 km · 0 m · Sat 10:00
28.4 km · 0 m · Sat 12:30
39.3 km · 0 m · Sat 14:30
46.6 km · 0 m · Sat 16:00
59.7 km · 0 m · —
65.1 km · 0 m · Sat 19:30
74 km · 0 m · —
78 km · 269 m · Sat 22:00
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