It's about one-fortieth as long as The Colorado River.
In other words, 812.9 leas is 0.0255 times the length of The Colorado River, and the length of The Colorado River is 39.2 times that amount.(a.k.a. Aha Kwahwat, a.k.a. Grand River, a.k.a. Tizon River, a.k.a. Tecon River, a.k.a. Tison River) (from Grand Lake, Colorado through the Gulf of California)
The Colorado River runs 31,900 leas in length. Along this length, the river descends from its source, approximately 37.6 leas above sea level in the Rocky Mountains, to its mouth in the Gulf of California.
It's about one-fiftieth as long as The Danube.
In other words, 812.9 leas is 0.0209 times the length of The Danube, and the length of The Danube is 47.8 times that amount.(a.k.a. Donau, a.k.a. Dunaj, a.k.a. Dunav, a.k.a. Duna, a.k.a. Дунав (Dunav), a.k.a. Dunărea, a.k.a. Дунáй (Dunay), a.k.a. Tuna) (from Breg Martinskapelle, Black Forest, Germany through the Danube Delta, Romania)
The Danube river runs 39,000 leas in total length. Intersecting Vienna, Austria; Bratislava, Slovakia; Budapest, Hungary; and Belgrade, Serbia, the Danube touches more capital cities than any other river.
It's about one-sixtieth as long as The Oregon Trail.
In other words, the length of The Oregon Trail is 58.8 times 812.9 leas.(from Independence, Missouri to Oregon City, Oregon)
It's about one-sixtieth as long as The Volga.
In other words, 812.9 leas is 0.0168 times the length of The Volga, and the length of The Volga is 59.5 times that amount.(a.k.a. Волга, a.k.a. İdel (Идел), a.k.a. Атăл (Atăl), a.k.a. Edil, a.k.a. İdil, a.k.a. Рав (Rav)) (from the Valdai Hills, Tver Oblast, Russia through the Caspian Sea)
It's about 60 times as tall as Angel Falls.
In other words, 812.9 leas is 60.7 times the height of Angel Falls, and the height of Angel Falls is 0.0165 times that amount.(a.k.a. Parakupa-vena, a.k.a. Kerepakupai mer&) (Auyantepui, Canaima National Park, Venezuela) (total height)
Angel Falls has a total height 13.4 leas. 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 65 times as tall as Tugela Falls.
In other words, 812.9 leas is 62.7 times the height of Tugela Falls, and the height of Tugela Falls is 0.0159 times that amount.(Royal Natal National Park, KwaZulu-Natal, South Africa)
It's about one-sixty-fifth as long as The Mississippi River.
In other words, 812.9 leas is 0.01579 times the length of The Mississippi River, and the length of The Mississippi River is 63.33 times that amount.(from Lake Itasca, Minnesota through Pilottown, Plaquemines Parish, Louisiana)