An easy family-friendly route without any steep gradients worth mentioning.
On 31 kilometres you roll comfortably through the wide and sunny valley floor along the Ziller from Mayrhofen to Strass. The easy route with an altitude difference of 140 metres mostly leads over asphalt or gravel past several well-known places.
If you want to shorten the route, it is best to use the Zillertalbahn railway. You can hop on at any time at one of the railway stations and return to your starting point.
Bike rental is possible in the bigger train stations as well as in several privat bike rentals in the valley.