Depends on how far you're willing to drive.
Royal Gorge is at a fun, easy level III-plus. Numbers is decent, IV-minus. Pine Creek is IV-plus to V-minus.
Bailey is at a fun, introductory-type flow (Four Falls is IV-plus, Supermax V, Deer Creek V-minus)
Gore is at a low but runnable level, generally 4-plus except Gore Rapid and Tunnel.
Pueblo ww park is at a fairly fun level -- though that could change in an hour.