I suppose total hours in the saddle is a better measure than total miles for this. For example at my pace, a 60-mile ride lasts 5 hours or more. Someone who rides faster would be sitting in the saddle for only 3-4 hours over that same distance.

But my brain is too full right now to try to estimate the number of hours I spent on all those rides, especially since my weekly hill rides are at a much slower pace. I think I might be able to get the numbers from Garmin Connect. I will check.