It's about 0.0000007 times as long as The Colorado River
In other words, 2.10 paces is 0.0000006870 times the length of The Colorado River, and the length of The Colorado River is 1,460,000 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 3,060,000 paces in length. Along this length, the river descends from its source, approximately 3,610 paces above sea level in the Rocky Mountains, to its mouth in the Gulf of California.
It's about 0.0000006 times as long as The Danube
In other words, 2.10 paces is 0.0000005610 times the length of The Danube, and the length of The Danube is 1,780,000 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 3,740,000 paces 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 0.0000005 times as long as The Oregon Trail
In other words, 2.10 paces is 0.0000004590 times the length of The Oregon Trail, and the length of The Oregon Trail is 2,180,000 times that amount.(from Independence, Missouri to Oregon City, Oregon)
The historic Oregon Trail stretched 4,580,000 paces 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 0.0000005 times as long as The Volga
In other words, 2.10 paces is 0.0000004530 times the length of The Volga, and the length of The Volga is 2,210,000 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 4,630,000 paces 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 0.0000004 times as long as The Mississippi River
In other words, 2.10 paces is 0.00000042490 times the length of The Mississippi River, and the length of The Mississippi River is 2,353,000 times that amount.(from Lake Itasca, Minnesota through Pilottown, Plaquemines Parish, Louisiana)
The total length of the Mississippi River is 4,942,000 paces. 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.
It's about 0.0000004 times as long as The Distance from L.A. to New York
In other words, 2.10 paces is 0.0000003560 times the length of The Distance from L.A. to New York, and the length of The Distance from L.A. to New York is 2,810,000 times that amount.(Los Angeles, California to New York City, New York) (via I-10 E, I-15 N, I-70 E, I-76 E, I-80 E, I-280 E)
The total length of the freeway route from Los Angeles, California to New York City, New York via Interstate 80 is 5,890,000 paces long. This route intersects eleven states and several major cities, including Las Vegas, Nevada; Denver, Colorado; Lincoln, Nebraska; Omaha, Nebraska; Des Moines, Iowa; South Bend, Indiana; and Cleveland, Ohio.
It's about 0.0000004 times as long as I-80
In other words, 2.10 paces is 0.0000003450170 times the length of I-80, and the length of I-80 is 2,898,410 times that amount.(a.k.a. Interstate 80, a.k.a. Keystone Shortway) (net length)
Interstate 80, crosses the continent of North America from Teaneck, New Jersey to San Francisco, California and covers a total length of 6,086,650 paces. A 78,740.20 paces stretch between mile marker 318 in Grand Island, Nebraska and mile marker 390 in Lincoln, Nebraska is the longest straight path in the US Interstate system.