Finding a Mass on the Camino

My impressions as of Jan 4:
Masses in general are at 7 or 7:30pm(so after your walk for the day) if you stay in a pilgrim-friendly town. Listen for the church bells going crazy. Usually, at the half or quarter hour, you will hear one ring. At the full hour you will often hear the # of strikes = to the hour it is (ie 10 strikes for 10am) 5, 15 or 30 min before mass, the bells will just ring crazily in a seemingly haphazard fashion.

Doors to churches generally remain locked until 30 min or 1 hr before mass, depending on the church, especially in the winter, even the ones that say they are open all day.