Park past the cattle guard on FR 10 and start biking up the first road heading east. This is Forest Road 10Q, but is probably not marked. After an easy 3/4 mile climb the road dips and then crosses a low area before climbing again at mile 1.
After a couple of dips and then steep climbs the road levels out at mile 2. At mile 3 the road becomes rutted and drops steeply down to FR 270, but you can bypass this by following the Forest Service property line to the left through the trees and finding a better route down to FR 270.
FR 270 now climbs steadily to the top of Cerro Pelado where you can enjoy the views and possibly have a chat with the occupants of the fire watchtower.