The valleys of Loučky and Bobrůvka stretch between the villages of Strážek, Střížeš and Skryje (approx. 10 km northwest of Tišnov). Approximately in the middle of this valley is Trenckova Rokle.
The beginning of the journey would logically be offered in the village of Skryje. On the one hand, the red sign leads from there. The transport from Tišnov here is not bad either. Well, I don't think the journey itself is that interesting, personally I'm in favor of the route from Drahonín. You can reach the red sign from Drahonín by following a dirt road, basically after getting off the bus it is enough to continue along the road, after a few meters it becomes a dirt road and after about two and a half kilometers you will be at the red sign near Šafránkova mlýn. There is also a nice view of the surroundings from this path, which we won't be able to enjoy in the valley.
I personally rank the road from here to the Trenck Gorge as one of the most beautiful tourist roads around Brno. For a while by the Loučka river, for a while on the slope above the river. Various obstacles await us on the slope in the form of fallen trees, sloping rocks and various elevations. However, be careful - in winter, under snow cover, I would not recommend going this part of the road in any case. The road is really on a slope, in addition on smooth rock in places, in combination with snow it is quite dangerous.