The Chicago Bears open their doors for a rare glimpse inside their headquarters at Halas Hall from 6-8:30 p.m. Dec. 9.

Tickets are $125 and proceeds benefit the Gridiron Alliance, which assists former high school athletes who were catastrophically injured while playing school sports.

The event includes a guided tour of the Bears training facility by Bears staff and Gridiron Alliance personnel. Current and former Chicago Bears players will be in attendance.

There will be a memorbilia auction including tickets to the Bears-Seattle Seahawks game.

For information and tickets, visit the Gridiron Alliance website.