Some notables:

Well I used the train on the way home but, the Henry Coe ride starting from my house got me around 48.68 miles as the crow flies (> 110 riden miles).

Glen's Sierra Rd plus hill ride (which we did start and end at home) got us (only) 30.38 miles.

Grenoble to Alpe d'Huez on folders: around 18.5 miles (29.77 km) as the French crows fly.

Ron's Sierra Rd + Calavares + Palomares ride from home was probably a good one too.