Ash Canyon Road (FR 59) at the trail-head has a stout new gate and signage since the fires of June 2011. Bob Thompson Peak is baggable in a small group with a bit of climbing experience/gear to work around the section outlined in the triplog provided by "The Mantis."
Gate Policy: If a gate is closed upon arrival, leave it closed after you go through. If it is open, leave it open. Leaving a closed gate open may put cattle in danger. Closing an open gate may cut them off from water. Please be respectful, leave gates as found.
WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.