Check out this limited series from Mushing Radio about Iditarod Through the Decades:

Part 1: The 1960s

Part 2: The 1970s

Part 3: The 1980s

Part 4: The 1990s

Part 5: The Early 2000s

Part 6: The Late 2000s

Part 7: The Early 2010s

Part 8: The Late 2010s

Part 9: Our Favorite Stories

Part 10: The Future