The Harschbichlbahn cable car takes you to the trailhead. If you want to stretch yourself a bit before starting the trail, you can also take the paved road up to the trailhead.
The trail starts with a difficulty rating of S2. Since you'll cross the forest road several times, you have the option of leaving the trail. This is a good alternative, especially if the roots are wet.
The final section of the trail is rated S1, but this shouldn't be underestimated.
The Harschbichltrail is 4km long in total, with 145 turns and 500 meters of vertical drop. The trail also offers various jetties and tables, all of which you can either bypass or ride over.
Good to know: The valley station of the Harschbichlbahn cable car is only 5 minutes from the Explorer Hotel in St. Johann.