Hi Dennisying -
I hope that you've been able to source a store in Leon where they have a good choice of trail runners. If you haven't been able to, El Corte Ingles in Leon has a very good Sports/Outdoors department - last year I found they had a whole floor devoted to everything sporting and outdoors. The address is: Calle Fray Luis de Leon 29. It's about a ten minute walk from the historic centre of Leon.
If you're undecided about which trail runners to buy, I can recommend La Sportiva Wildcat trail runners - they're an Italian brand and they have a wide toe box. They also feature a moulded shoe tongue that has no stitching on it so, once the shoe is laced up, it sits very comfortably on the top part of your foot, with no pressure on the foot bones as sometimes happens with shoes that have tongues which are stitched.
Alternatively, if you can get to Astorga with your current shoes without the risk of injury or blisters, there's an excellent outdoors store to go to - Deportes Huracan at Plaza Santocildes, 1. It's on one of the main squares as you come into Astorga - the second one, from memory. The owner of the shop is Swiss - he's lived in Spain for well over 25 years and his shop has served pilgrims for many, many years. He's a specialist fitter of sports and hiking shoes and he will really look after you. You can't miss the shop - it has a huge backpack out the front.
Good luck with your new shoes - take joy in every step and every moment.
Buen Camino -
Cheers from Oz - Jenny
PS - at the time of typing I hadn't seen HedaP's post - that sounds like a great option - it sounds as though they have a great choice - are pilgrim footwear specialists and their location is terrific.