Hard to say precisely, and I should add that it doesn't necessarily have to be race related. But a classic example would be Cortes Base in Ross 1047.
Perched as it was on a ridge like that, it provided a spectacular location for racing around a ringed city but also meant we could stage Pomeche ridge like SRV races to and from the city. Another great example would be two (or more) planetary bases less than a few hundred km apart (that we could race between). There were plenty of these in Horizons but it's not clear whether there are many in Odyssey at all which seems to have gone to great pains to spread them out around planets.