Her visitation is happening from 1 to 8 p.m. Tuesday at Oehler Funeral Home in Des Plaines.
She was loved and respected as a wife, mother, grandmother, NFL owner, churchgoer and community member, putting others first with respect and kindness throughout her 102 years.
Tuesday is a chance to her family, friends, colleagues and fans to return the same.
A steady flow of attendees has come and gone. Among them were members of her immediate and extended family, fellow NFL owners, coaches and current and former players.
Commissioner Roger Goodell is expected at some point later Tuesday or Wednesday.
None of this is a surprise, McCaskey not only watched as much football as she could, but was intentional about getting to know the players, their families and making sure they knew their role with the Bears was about more than just football because hers certainly was.
As the team's matriarch, giving back was a high priority, and the motivation behind Bears Care, which is where the family continues to request any and all donations go.
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A private funeral will be held Wednesday at Saint Emily Catholic Church in Mount Prospect, where she was a very active member.
But, she was also very private, which is reflected in how the family is handling this two-day celebration of a life well-lived.
McCaskey served as the Bears owner since Oct. 31, 1983, on the death of her father, Bears founder George Halas.
Like her father, a co-founder of the NFL, McCaskey kept the team in family hands. She gave operational control and the title of president to her eldest son, Michael McCaskey, who served as chairman until being succeeded by brother George McCaskey in 2011.
During her stewardship, the Bears won a Super Bowl in 1986 and lost a second 21 years later.
McCaskey, the older of Halas' two children, never expected to find herself in charge. Her brother, George "Mugs" Halas Jr., was being groomed to take over the team, but died suddenly of a heart attack in 1979.
McCaskey assumed ownership upon her father's death in 1983, and her late husband, Ed McCaskey, succeeded Halas as chairman. Not long after, she turned over control to Michael, the eldest of her 11 children.
McCaskey's official title was secretary to the board of directors. Despite her generally hands-off approach and low public profile, she occasionally exercised ultimate authority on team decisions as matriarch of the family.
McCaskey had 11 children, eight sons and three daughters. She is survived by her sons Patrick, Edward Jr., George, Richard, Brian and Joseph, and daughters Ellen Tonquest, Mary and Anne Catron. She is also survived by 21 grandchildren, 40 great-grandchildren and four great-great-grandchildren.
The Associated Press and ESPN contributed to this report.