We're giving this page a facelift!Visit the previous versionto make edits.Peak Mountain 3Add photo Edit (TBD) Photo MapCopy LinkHomeUSACaliforniaSierra EastsideMammoth Lakes Area* Mammoth Lakes BoulderingLake GeorgeFamily BouldersSister BoulderLittle SisterV1SiblingsV4Big SisterV5boulderingFA unknownUPDATED BY vietnguyen DescriptionRoutes in Sister Boulder1Little SisterV1Bouldering2Big SisterV5Bouldering 3SiblingsV4Bouldering4Problem AV1Bouldering5Problem CV3-Bouldering6Problem DV1Bouldering7Problem EV1Bouldering8West Face VariousV-easyBouldering