That's high. A
rule of thumb for 50 ohm impedance-controlled traces on FR-4 is about 3.3pF/in. If my math is correct, a 0.25mm wide trace on FR-4, surrounded by copper 0.5mm away from all edges, with nothing on the other side of the board, has roughly 50fF/mm of parasitic capacitance. So I just put 5.6pF load caps on and hope for the best.

You can tune the error out, if you really need to (see
ST AN2604 for details).
Disclaimer: signal integrity isn't my specialty, not even close.