Locations Our new Trillium location at Leander is now open! Space is limited, and with pre-enrollments, spots are filling up quickly. Make sure to book your tour today! Austin Phone Number: (512) 779-3883Address: 9707 Anderson Mill Rd #350, Austin, TX 78750Email: trillium.austin@gmail.com Round Rock Phone Number: (512) 779-3883Address: 1000 Sam Bass Cir, Round Rock, TX 78681Email: trillium.roundrock@gmail.com Leander Phone Number: (512) 779-3883Address: 1699 US 183N, Leander, TX 78641Email: trillium.libertyhill@gmail.com