The Mud Bowl was the colloquial name for the 1950 Grey Cup championship of professional Canadian football, which was won by the Toronto Argonauts by a score of 13-0 over the Winnipeg Blue Bombers.

On the day prior to the game, a rare, heavy late November snowfall blanketed the field of Varsity Stadium in Toronto, the site of the championship. Heavy equipment was sent to the site to clear the snowfall before the game started. However, much of the equipment merely damaged the turf, which was already in bad shape from poor groundskeeping during the regular season. To make things worse, on the morning of the game the weather turned much warmer, and the heavy snow turned into a steady rain. By game time, the field was completely torn up and soaked with water, with the rain continuing through the entire game. The game was anti-climactic with both teams having extreme difficulty moving the ball in the conditions, and field markings being all but non-existent.

However, the aftermath of the contest brought severe criticism of the league and the choice of Varsity, which had traditionally hosted the game almost every year due to its relatively large capacity and generally warmer weather in late November compared to other Canadian cities in the league. A particular criticism was the lack of a tarpaulin to protect the field, which could have been obtained for approximately $5,000. In fact, the Calgary Stampeders (who had faced bad field conditions in the 1948 championship game) offered to pick up the expense on behalf of the league, but the offer was declined. Although Varsity Stadium, and later Exhibition Stadium, continued to be the venue of choice for the Grey Cup, the criticism of the conditions during the Mud Bowl eventually led to the venue shifting among the Canadian Football League cities on a regular basis. In fact, in recent years, the championship has rarely been held in Toronto.

Other Grey Cup games notable for the weather:

• The 1963 Fog Bowl at Exhibition Stadium in Toronto.

• The 1965 Wind Bowl at Exhibition Stadium in Toronto.

• The 1977 Ice Bowl at Olympic Stadium in Montréal.

• The 1982 Rain Bowl at Exhibition Stadium in Toronto.

• The 1996 Snow Bowl at Ivor Wynne Stadium in Hamilton.