Travel on the A12 (Inntal motorway) in the direction of the A13 (Brenner motorway). Take the junction for "Stubaital (Schönberg)". This is a toll-road (€2.50).
Do not forget that the motorways in Austria require you to display a vignette on your windshield, which is a motorway toll sticker (vignettes are either valid per day, week, month or year). You can purchase these from all petrol stations or from currency exchange offices and border entry points.
Continue along the main road towards Neustift. When you reach Neustift, turn right immediately before the church in the direction of Milders. Pass Hotels Kindl und Sport Schönherr in the district of Milders . You will then see Hotel Holzknecht on the right-hand side. Around 100 m behind it, turn right and you will have arrived at your destination.