Original Castle Heights is a silent witness to the Columbia Heights Loop, a circuit that weaves through the residential density of this Minnesota town. The 3.4 mi course demands a steady hand across 18 corners, requiring a balanced approach to maintain speed through the mid-tier technical sections. A 33 m difference in elevation adds complexity, punishing those who lose momentum on the rises. The loop, which plays free in the browser with no account and no install, passes beside Keyes Park before returning to the heart of the town.