Below map is from the ViewRanger app.
Our planned route to Hoya del Gamonal was clearly marked not far from the bus station in San Mateo
The first part was up a very straight steep tarmac road
After about 50 minutes of continual climbing, we left the road and followed the signposted walking trail which continued fairly steeply uphill.
Wonderful views towards Las Palmas
Excellent picnic spot for lunch
The hamlet of Hoya del Gamonal
All major splits in the route were clearly signposted
The bend in the GC-15 road at El Portillo where we caught the nr305 bus at 1524 hrs to San Mateo
The walk was 11 km long, height gain 966m, height loss 552m, max altitude 1521m, time taken 5 1/2hrs.
After a beer in San Mateo we caught the 1630hrs nr 303 bus back to Las Palmas, getting off at the yellow bus station close to Telmo to catch the nr 1 bus to close to the Triodus Bank by the Marina.