Alley Spring and Mill

Missouri's seventh largest spring pours about 81 million gallons a day past a bright red 1894 roller mill, in the most photographed corner of the Jacks Fork country.

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Some places earn their postcard status honestly. Here a spring strong enough to run a mill pushes about 81 million gallons of water a day out of a dolomite bluff, sends it down a half-mile branch to the Jacks Fork River, and does all of it beside a tall red roller mill built in 1893 and 1894. The spring is the seventh largest in Missouri, and the water in its branch holds a steady 58 degrees as it runs to the river.

The mill is the human half of the scene. George Washington McCaskill built it as a merchant mill, larger than most in the Jacks Fork country, on a site where a mill had already stood since 1868. It was painted white with green trim first and only later took on the red everyone photographs today. Inside, in season, the Park Service runs it as a museum of Ozarks life: grain came in on the first floor, rose through elevators and chutes, and came back down through the sifters as flour. The basement and attic are not open, and the mill building closes for the season at the end of October, so plan a summer or fall visit if going inside matters to you.

Two walks finish the visit. A short trail of about a third of a mile circles the spring and follows its branch, close enough to watch the clear water work its way toward the Jacks Fork. The Overlook Trail is the bigger ask: a 1.3-mile loop that climbs the bluff the spring pours from, looks straight down on the red mill and the blue pool, then levels out through pine and oak woods before switchbacking down to the branch. The spring itself is strictly look-only under park rules, so bring a camera instead of a swimsuit.