The row of purple seats at Coors Field marks the mile high point.
Baseball Across America: Denver
Ballpark Brothers Coors Field, Denver, CO
Rockies, after 20 years, still trying to solve high-altitude baseball puzzle – The Denver Post
Coors Field Review - Colorado Rockies - Ballpark Ratings
A possible answer to why Denver is Mile High City – The Durango Herald
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Coors Field
Coors Field Single Purple Seats (20th Row) - Archer Stadium Seating