The starting point for hiking in Slovakia National park Velka Fatra and to the hills Ostra and Tlsta is village Blatnica. Above the village are situated also the ruins of Blatnica castle. You need app. 30 min to get to the ruins following yellow signs.
If this small trip is not enough for you, than you shall go to Tlsta and Ostra hill. It takes app. 7 and 1/2 hours.
As for other tours in Slovakia you can choose between more options and ways. We recommend reaching the hills via valleys Vapenna valley or Konsky dol valley. The direction does not matter.
The hiking is quite difficult with rapid ascending. Watch out for leafs and mud, could be slippy. On the way in Vapenna valley is situated Mazarna cave with free access. It is 130 metres deep. On the way to the Ostra hill you will use also chains for climbing.
Both hills offer beautiful views.