Theodore Wirth Park is the regional park managed by the Minneapolis Park and Recreation Board. The park land is shared by Minneapolis and the neighboring suburb of Golden Valley. Formally named Theodore Wirth Regional Park, it includes two golf courses (an 18-hole course and a 9-hole par 3 course), Wirth Lake, Birch Pond, cross-country ski trails, mountain biking trails, snow tubing hills, and other amenities. It forms a significant portion of the Grand Rounds Scenic Byway, linking the Chain of Lakes area with the Victory Memorial Parkway.

The park that became known as Theodore Wirth Park was established in 1889 with an initial acquisition of 66 acres (270,000 m²). The park currently occupies 759 acres (3.07 km²), which is 90% of the size of New York City's Central Park at 843 acres (3.41 km²). It was eventually named for Theodore Wirth, who was superintendent of Minneapolis parks for 30 years from 1906 to 1936.

The park was the venue for the 2024 Stifel Loppet Cup international cross-country ski competition.^[1]

A geographic marker at one corner of the park grounds, at Wirth Parkway and Golden Valley Road, marks the 45 degrees latitude line, exactly halfway between the equator and the North Pole.^[2] The badly weathered plaque was refurbished around 2006.

• 45th Parallel marker
• A sign along the Parkway

• America's Byways: Theodore Wirth Park
• Minneapolis Park & Recreation Board: Theodore Wirth Regional Park