Brolga Bill's Bike Trail (BBBT)
'Twas Brolga Bill, from Rutherglen, that caught the cycling craze,
He turned away the good old wings that served him many days...

This geoart shows Brolga Bill's bike.
It is designed so you can be like Brolga Bill, and complete the trail by bike.
(and hopefully not come to the sticky end like his mate Mulga Bill)
All the puzzles are about bike riding, and can be solved with an easy online search.
The puzzle
Murray to Mountains Rail Trail.
The section that runs between Rutherglen and Wahgunyah is all out on its own from the rest of the trail.
Question:How long is this section? (in Km)

You can validate your puzzle solution with certitude.