Hours Of Operations Serenity Spa Colorado Boulder 80301 Serenity Spa Hours of Operation and Location in Boulder, CO 80301 4.1 - 146 votes 3445 Penrose Pl, Ste 260, Boulder, CO 80301 (303) 447-8889 Get Directions Serenity Spa Hours Category: Beauty & Health Hours Hours may vary due to season or holiday reasons. For specific hours, please contact store directly. Map Explore BoulderView More Apparel MarshallsRoss Dress for LessColdwater CreekH & MCarhartt Sports TargetSports AuthorityNorth FaceVansColeman Jewelry MarshallsChico'sJ JillCharming CharlieAlex and Ani Recommend For You Essential Spa Paris Nails Eagle Nails Wal-mart Pharmacy Health Street American Laser Center Polish Polish Sybase Incorporated Pc Doc Computer Troubleshooters