Originally Posted by
fietsbob
a mix of both.. Oklahoma is not famous for its mountains .. where are you riding?
In south broken arrow and south tulsa, plenty of natural hills up and down along the path I'll be taking. 9 miles of my route will be along a turnpike trail. The turnpike alternates a few times between being elevated or sunk in relation to the regular streets, every mile there's an entrance/exit ramp and the trail follows those ramps, have to go up or down to cross those city streets rather than remaining elevated or sunk with the turnpike so 9 good man-made hills too.
Out in Southeast OK there are some big hills that some people call mountains.