the only limiting factor on where or how far you can ride
is
time in the saddle, tuning the pedals.
the only drawback is that upright bars are often not as good for longer distances because there is only one hand position
unless you change to anatomic grips, like Ergon's with integrated bar ends..
Or, as I am preferring Figure 8 bend trekking bars.. all the controls transfer directly,
and there are a lot of different ways to hold on..