We first went to a beautiful piece of bosque mesofila (montane or cloud forest) about half an hour from Comaltepec, but it was pouring down rain and everybody was getting soaked when we tried to demonstrate how to make dendrometer bands (see How To Make Dendrometer Bands). Everyone agreed that we should just go back to El Mirador where we were having the workshop and try to do the demonstration there. Under a roof. So, we got a couple of small oak logs from a nearby sawmill, set them up on a table, and let everybody put a growth band around them. Worked great. Everyone could concentrate on making the bands - not staying dry.