In Canarias 7, one of the most important local newspapers , I have found an online guide for walking trails around San Mateo, Tejeda, Valsequillo, Santa Brígida.
There are approx. 35 different routes in beautiful landscapes to choose from. Each route can be downloaded in a pdf file. In the pdf file there is a map and a description.This is the link: http://www.canarias7.es/ocio/ediciones/ed_senderos.cfm
Unfortunately this one is in Spanish. As soon as I find the english one I will publish the links here.
Good walking :-)
By Ramón Sánchez Bruhn