How many letters does the top answer for “home of hayward field” have?

The most common answer is eugene (6 letters).

Crossword clue: home of hayward field

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

eugene 6 letters wd-fact-v3

a city in western Oregon on the Willamette River; site of a university

home of bmo field 50% similar → toronto

home of coors field 50% similar → denver

home of ford field 50% similar → detroit

home of lambeau field 50% similar → greenbay

home of lumen field 50% similar → seattle

home of rate field 50% similar → chicago

home of soldier field 50% similar → chicago

home of target field 50% similar → minneapolis