About Sage Mountain Sage Mountain takes senior living to a whole new level. Tucked along a breathtaking Thousand Oaks, California, hillside, Sage Mountain offers days filled with stunning views, plenty of sunshine, and a variety of engaging activities that encourage connection and joy. Our warm and inviting senior living community brings residents a variety of living options, including Assisted Living, In the Moment® Memory Care, and Respite Care options. No matter how you or your loved one enjoys spending your days, the caring and supportive staff at Sage Mountain will be nearby 24 hours a day, helping residents live life to their highest level of independence.