It's about 7,000 times as long as an Aspirin
In other words, 100 meters is 7,100 times the length of an Aspirin, and the length of an Aspirin is 0.0001 times that amount.(for up & up aspirin, 325mg, regular strength tablets) (a.k.a. acetylsalicylic acid, a.k.a. ASA)
A single aspirin tablet measures 0.014 meters in diameter. One of the most common medicines in the world and a foundation of worldwide health systems, an estimated 40,000 metric tons of aspirin are consumed each year.
It's about one-fifteen-thousandth as long as The Rhine
In other words, 100 meters is 0.0000758 times the length of The Rhine, and the length of The Rhine is 13,200 times that amount.(a.k.a. Rhein, a.k.a. Rijn, a.k.a. Rhin, a.k.a. Rain, a.k.a. Reno, a.k.a. Rhenus, a.k.a. Ryn) (from near Reichenau, Switzerland through Hoek van Holland, Rotterdam, Netherlands)
The Rhine river runs 1,320,000 meters in total length. The World War II Battle of Arnhem, as memorialized in the 1974 book and 1977 movie A Bridge Too Far, was the first of several attempts to capture key bridges across the Rhine, beginning with the Arnhem Bridge in the Netherlands.
It's about one-twenty-five-thousandth as long as The Colorado River
In other words, 100 meters is 0.0000429 times the length of The Colorado River, and the length of The Colorado River is 23,300 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 2,330,000 meters in length. Along this length, the river descends from its source, approximately 2,750 m above sea level in the Rocky Mountains, to its mouth in the Gulf of California.
It's about one-thirty-thousandth as long as The Danube
In other words, 100 meters is 0.0000351 times the length of The Danube, and the length of The Danube is 28,500 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 2,850,000 meters 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-thirty-five-thousandth as long as The Oregon Trail
In other words, 100 meters is 0.0000287 times the length of The Oregon Trail, and the length of The Oregon Trail is 34,800 times that amount.(from Independence, Missouri to Oregon City, Oregon)
The historic Oregon Trail stretched 3,490,000 meters across five (sometimes six) states in the western United States. In the early years of the Trail's existence, the trip was estimated to have taken an average of 160 days.
It's about one-thirty-five-thousandth as long as The Volga
In other words, 100 meters is 0.0000283 times the length of The Volga, and the length of The Volga is 35,300 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)
The largest river in Europe, the Volga river runs 3,530,000 meters in total length. World War II's Battle of Stalingrad between the Nazi Germany and the Soviet Union, which resulted in nearly two million casualties, was fought in part for control of the river.
It's about one-forty-thousandth as long as The Mississippi River
In other words, 100 meters is 0.00002655 times the length of The Mississippi River, and the length of The Mississippi River is 37,660 times that amount.(from Lake Itasca, Minnesota through Pilottown, Plaquemines Parish, Louisiana)
The total length of the Mississippi River is 3,766,000 meters. Prior to the development of soil erosion programs, the Mississippi River would carry approximately 400 million metric tons of sediment from its banks to the Gulf of Mexico every year.