Review for Harrah's Reno Casino and Hotel Review For Thunder Valley Casino Resort Google User Dec 31 '17 at 15:06 I've been visiting Thunder Valley for many years now, way before the hotel was even built. Just recently I received promotions that included free rooms for the past 3 months.. The rooms were great, the staff was great and I can't wait to receive more free rooms and bonus play again! I'll be waiting.. View full site to comment or like