It certainly looked as though it was going to be fun, women of all ages chatting away in their finery but it seemed as though it would be quite a while before things got going. There were amplifiers along the bridge with music being played. As I have mentioned in a previous post of mine, next time I'll take more time to stop and enjoy the day more and not rush to the next accommodation, although "rushing " is perhaps not the right word at age 73!
Thank you to RobinK and Martin888
Yes, that was it as it was on Sunday 19 May 2019. I did Google when I got home but didn't get any results, perhaps it just couldn't find it in English v Spanish. Regrettably, I can't recognize the pilgrims in the photo on the second link although I must have seen them on the previous days or at Astorga that evening. Thanks for the link.
I caught the festival just as it started. My partner and I decided to stay an extra night to watch and participate in the festivities. The food they prepared was pretty bland. No spices to add. You have to ask just for salt and pepper. But the Sangria was good! I was there in early June, 2018. I am just sorry I did not spend one more day there at the festival!