A litter box with an open roof formed by inwardly arced gutters and a sidewall entrance is provided. The sidewall entrance also includes an inwardly arced gutter that extends from the bottom edge of the sidewall entrance into the interior space of the litter box. The inwardly arced gutters redirect litter kicked against the walls of the litter box back into the center of the box to prevent litter spilling and tracking. The open roof allows for better ventilation and animal comfort and prevents the litter box from being used as a safety hideout by animals. The sidewall entrance allows easy access to the litter box by animals.
