20 km. One of the most technical mountain bike routes in the region and one of my favourites.
Most of the route is single track with almost continual ascents and descents. The South West area will involve some short walking sections. The northern shore is used by forestry vehicles and short sections can occasionally be quite churned up making it almost unrideable but this is only a minor inconvenience.
The route can be started either by the dam on the Lokve village end of the lake or at the other end by Mrzle Vodica. The route is fairly well sign posted mainly with Orange "POJ" spray painted on tress. POJ stands for Put Oko Jezera "Path around the lake". It is easiest to do the route clockwise as this is the way the signs are set up.
By car the route can accessed in two places. The official start is by the dam near Lokve village. The access point closest to Rijeka is by the bridge at the other end of the lake at Mrzle Vodice. There is an obvious café with plenty of parking nearby. To reach this point drive to Gornje Jelenje by either by starting on the highway towards Zagreb and turning off just before the toll collection as for Platak. Keep going up the hill past the turning for Platak to Gornje Jelen. A couple of hundred metres later turn left, sign posted for Mrzle Vodice. Alternatively Gornje Jelenje can be reached by taking the highway towards Krk and taking the Meja exit. Then follow signs for Zagreb. Cross the railway and keep going straight when passing the highway.
From the north turn off for Delnice and turn left for Lokve immediately after the toll collection.
While not particularly convenient the route can be accessed by train. Get off at Lokve station. Unfortunately the only train that carries bikes here in the morning is the 05:35, arriving at 06:35. It is then at 8km ride to the dam. there is very small campsite just below the dam. It has CAMPING painted on the roof so is pretty obvious from the dam. It is possible to swim in the lake in summer so a pleasant weekend excursion. The only other train carrying bikes leaves Rijeka at 13:35.
There is no train back from Lokve carrying bicycles. The trains from Fuzine, which is 10km away, depart at 19:56.