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Given a passage and a query based on the passage, generate an unambiguous, concise and simple answer to the query from information in the passage. Note that the answer may not be present in exact form.

Itasca State Park. Established in 1891, Itasca is Minnesota's oldest state park. Today, the park totals more than 32,000 acres and includes more than 100 lakes. Walk across the mighty Mississippi as it starts its winding journey 2,552 miles to the Gulf of Mexico. Stand under towering pines at Preacher's Grove. Travelers can spend a day exploring a short portion of the byway, or a week traveling through several states or many weeks traveling the entire length of the river. It would take a lifetime to truly experience all that the Great River Road has to offer. Start your Great River Road journey today. Find current road conditions along the Great River Road. Learn more. 6 things you might not know about the Great River Road; Four things to love about the Great River Road; Travel along the Great River Road with author Gayle Harper; Celebrate Drive the Great River Road Month in September Back in the day, when I was in high school, I wanted to take a paddle boat down the Mississippi River. But, more recently, we kinda thought that maybe it would be best to take a canoe. This winter, my brothers really wanted to go, and that pushed us to make it happen this summer. There are seven National Park Service sites along the Mississippi River. The Mississippi National River and Recreation Area is the National Park Service site dedicated to protecting and interpreting the Mississippi River itself. The mile marks go upriver so mile zero is at the lower end of the upper Mississippi River at Cairo, IL. In all there are 29 locks to pass through on the upper Mississippi River. The Mississippi River may be the most musical river in the entire world! Drum songs, folk songs, blues and jazz were all created and recreated along its banks. In Life on the Mississippi, he wrote of having seen monstrous-sized catfish six feet long, weighing 250 pounds.. Even today, traditions and myths survive among river people of giant fishes and other river creatures of fabulous size. The lower Mississippi is very different from the upper river. The upper river has many islands, back channels, and back water areas. Crossing are often 5 miles wide. In contrast, the lower Mississippi runs in a single narrow deep channel at a relatively fast rate of flow. The Mississippi is one of the world's great rivers. It spans 3,860 miles (6,210 km) of length as measured using its northernmost west fork, the Missouri River, which starts in the Rocky Mountains in Montana, joining the Mississippi proper in the state of Missouri. My folks at age 22 canoed down the Mississippi in 1940 in my dad's homemade yellow canoe. People in the river towns took them in at night and fed them. They went all the way down to St. Louis. I believe they started in northern Illinois somewhere. Query: how long does the mississippi river go
Output:
The Mississippi river goes upto 3,860 miles.