It's about four-fifths as long as The Preakness Stakes.
In other words, 666 lengths is 0.84976080 times the length of The Preakness Stakes, and the length of The Preakness Stakes is 1.1768020 times that amount.(Pimlico Race Course, Baltimore, Maryland) (total race length)
The total race length of the Preakness Stakes run at the Pimlico Race Course is 783.750 lengths. Dubbed "the race for the Black-eyed Susans" after Maryland's state flower, the winning horse is actually draped with a garland of painted yellow daisies, as Black-eyed Susans do not bloom in time for the late-May race.
It's about four-fifths as long as The Kentucky Derby.
In other words, 666 lengths is 0.8072730 times the length of The Kentucky Derby, and the length of The Kentucky Derby is 1.238740 times that amount.(Churchill Downs, Louisville, Kentucky) (total race length)
The total race length of the Kentucky Derby run at Churchill Downs is 825 lengths. First run in 1864, the Kentucky Derby is one of the oldest continuously-running sporting events in America, almost two years older than the Westminster Kennel Club Dog Show
It's about seven-tenths as long as The Beast (Roller Coaster).
In other words, 666 lengths is 0.7240 times the length of The Beast (Roller Coaster), and the length of The Beast (Roller Coaster) is 1.3810 times that amount.(King's Island Amusement Park; Mason, OH)
The roller coaster The Beast is 919.90 lengths in length. On its twenty-fifth year of operation in 2004, The Beast was awarded the Landmark Award by the American Coaster Enthusiasts as a historically significant roller coaster.
It's about two-thirds as long as The Belmont Stakes.
In other words, 666 lengths is 0.67272730 times the length of The Belmont Stakes, and the length of The Belmont Stakes is 1.4864860 times that amount.(Belmont Park, Elmont, New York) (total race length)
The total race length of the Belmont Stakes run at Belmont Park is 990 lengths. It was during the 1974 Belmont Stakes that Secretariat set an America Grade 1 stakes record in winning by a distance of about 31 lengths
It's about two-thirds as long as Steel Dragon 2000.
In other words, 666 lengths is 0.65510 times the length of Steel Dragon 2000, and the length of Steel Dragon 2000 is 1.5260 times that amount.(a.k.a. スチールドラゴン2000) (Nagashima Span Land; Kuwana, Mie Prefecture, Japan)
The roller coaster Steel Dragon 2000 is 1,017 lengths in length. It is one of only two operating "Gigacoasters" (meaning its height is between 37.50 lengths and 49.880 lengths) in the world, having a height of 39.780 lengths.
It's about one-and-two-thirds times as tall as Angel Falls.
In other words, the height of Angel Falls is 0.6020 times 666 lengths.(a.k.a. Parakupa-vena, a.k.a. Kerepakupai mer&) (Auyantepui, Canaima National Park, Venezuela) (total height)
Angel Falls has a total height 401 lengths. Jimmie Angel, the first person to publicize their existence outside Venezuela and the namesake of the falls, damaged his monoplane atop the falls and was forced to abandon it; it remained there until it was removed 33 years later.
It's about one-and-seven-tenths times as tall as Tugela Falls.
In other words, 666 lengths is 1.710 times the height of Tugela Falls, and the height of Tugela Falls is 0.5850 times that amount.(Royal Natal National Park, KwaZulu-Natal, South Africa)
Tugela Falls rises to 389 lengths in height. The falls are the highest in Africa and the second highest in the world.