We're giving this page a facelift!Visit the previous versionto make edits.Peak Mountain 3Add photo Edit (TBD) Photo MapCopy LinkHomeUSACaliforniaSan Diego CountyNorth San Diego CountyRancho Penasquitos CanyonThumb BoulderHangnail RightV4Hangnail LeftV2boulderingFA unknownUPDATED BY vietnguyen DescriptionRoutes in Thumb Boulder1Hangnail LeftV2Bouldering 2Hangnail RightV4Bouldering3Lucah ThumbV2-3Bouldering