Living in a relatively hilly area,I usually do around 1600 - 1800 metres for every 100 -120 km ride. So for me personally I consider anything over 2000m per ride a lot. Heading to the higher country (approx 200m higher than home) southwest from home I can usually tick up over 2000m gain in a 100k ride.

Most I've managed is a bit over 2800m in a 130km ride. Some mighty hills that day!