We're giving this page a facelift!Visit the previous versionto make edits.Peak Mountain 3Add photo Edit (TBD) Photo MapCopy LinkHomeUSAColoradoBoulderFlatironsSouthSibling, TheNorthwest Arete5.8Chockstone Roof5.7Direct North Face5.10 RtradFA T. Bubb, C. Parks, 11/04UPDATED BY vietnguyen DescriptionRoutes in The Sibling1Northwest Arete5.8Tr · Trad2Direct North Face5.10Trad 3Chockstone Roof5.7Trad