Follow the road up from the timber stacking area. About halfway through, the road splits in two. Turn left. When you reach the end of the road, it changes to a path and the terrain flattens out more. Feel free to visit Hundsnesvardane, a scenic viewing point at the end of the road:
https://morotur.no/tur/Hundsnesvardane.
After the end of the road, you will come up to the mountain plateau. From here, follow the same marked and signposted route as described here:
https://morotur.no/tur/Hundsnes-Brandalsdemningen. About halfway between the lakes Måsevatnet and Olalidvatnet, turn off northwest and walk up to Store Krokhornet. The start of the ascent is signposted, and the path here is solid and clearly defined despite not being marked. The final section is a rocky slope.
For an easier version of this trail, start walking from the dam at Lake Børevatnet. In that case, the starting point is already at the height of 380 metres above sea level, which means there is less elevation gain.