I am from a small town (Hastings, PA - you'll see it on your maps) north of Ebensburg and not too far from Madera.
I've cycled in these areas for many years.
Best bet, is to take the recommended route to Ebensburg (as mentioned above) and either ride old Route 219 North to Carrolltown and then various routes of your choosing to Patton, PA. From Patton gain Route 36 South for just a mile and proceed toward Prince Gallitzin State Park (stay on the North side of the lake) and gain Route 53 at Fallentimber and ride Route 53 all the way to Madera.
Route 53 can be busy on a weekday, but weekends are fine. It does have a decent shoulder.
If you want a "really backroad" type of route from Ebensburg to Patton and Patton to Madera, PM me and we can connect offline.
If you don't want further advice, that is fine, just avoid the (map based/linear) idea of taking route 253/453 combo from Fallentimber as you will climb a couple thousand vertical feet in about 12 miles, whereas route 53 runs the creek valley the entire way and is mostly flat.
This is a very scenic area, but also hilly as you are in the Allegheny Ridge Summit region. wp