Over four Jizera Mountains on cross-country skis

I start the description of the circuit at Hřebínek. It is a crossroad to the Jizera Mountains cross-country trails, which we can reach from different places depending on where we are staying or where we leave our vehicle. The route is intended more for "expedition" cross-country skiers who, rather than devouring kilometers in a perfectly milled track and outrunning a number of other cross-country skiers, prefer more peace and solitude at the cost of the occasional…