A 1000m ascent to Kuk, another hill on Slovenian - Italian border, is not easy. The slope in its first half is very steep, but yet not so difficult as some others since all the way to the top is asphalted. The descent takes you across the border toward Topolovo and switches back to Livek from where a funny descent to Idrsko is available. Funny cors there are so many forest roads you easy miss the right one but eventually get down to Idrsko village.
1300m of altitude difference, 10km of ascent, 13% of average slope, with 20% steepness on the very beginning of ascent just outside Zatolmin - these are some facts that make this way up to Sleme not very popular among mountain bike riders to say the least. But there are some who like it just for these facts. The way up takes some effort but when you get to the top where the highest mountain pasture of Tolmins region lies the view opens to the Julian alps on the East and West side. From here many possibilities for descent are available. The most popular is to go down to Mederje and via Pretovč straight down to Zatolmin. The single track is always empty and it allows a very high speed descent with some rocky sections just to keep the thing interesting.