Location - Hidden Valley, North Queensland, Australia
Distance - ~23 km one way
Time - 7-10 hours one way
Grade - 4, the track is overgrown.

The Jacobsen Track provided access from Ingham to the mining town of Ewan. It passed near Mount Jacobson to Hidden Valley and was the earliest of the Mt Spec tracks and the one most used. It was named after its trailblazer Sigvardt Jacobson, known locally as Sid. He was born in Christana, Norway in 1849, spent 33 years in Queensland and died on 5th July 1905 at Francis Creek from dengue fever.

Either end of the track is accessed via private property and prior permission is required.