Continued west on Mex. Hwy 80 into the Sierra and spent the night at the forest fire tower at the crest of the road across the mts. It had brief showers early in the evening and a good deal of lightening - must rain we've had so far. 3 May. Up about 7th and set off to hunt the area after putting gear away. No breakfast this morning as it's too humid, the dishes were left dirty from last night & there's not that much left to eat. That's all that appealing. Fire tower 2.0 miles E. Agua Zarca on Mex. Hwy .80; San Luis Potosi. The hilly crest of the road over the Sierra. Mostly oaks - many bromeliads - although the funky bromeliads that we found a Gomez Faras are fewer in number here and lack water. The area looks like it could be rated as low grade cloud forest. There is an auxiliary house for the tower on the road at the base of the hill for the tower. The base of this hill behind the house has been cleared as have two L paths broad up to the tower. These cleared areas have rock outcrops (limestone) and behind the "house", at least, downed oak trees.