The psychometric properties of the Life Perspectives Inventory (LPI-English language version), a new instrument designed to assess characteristics associated with nonreligious spirituality in high school-age adolescents, were examined in two phases. Phase 1 demonstrated the survey's factorial validity and internal consistency and the test-retest reliability of four derived dimensions (Optimistic Outlook, Purpose and Meaning in Life, Connection with the Divine, and Active Spirituality) with a large sample ("N" = 531) of Washington state high school students. In Phase 2, the LPI's dimensionality was cross-validated using confirmatory factor analysis with more than 400 Michigan high school students. Alpha and stability coefficients computed with the Michigan sample provided further evidence for the LPI-E's reliability. Implications for school counseling practice are included.