If Iowa has a wonder that defines it, we think it’s got to be Effigy Mounds National Monument. The only national monument in Iowa, this stunning preserve contains a variety of impressive mounds formed by early Native Americans in the region, taking the shape of various animals and symbols. This is one of the most popular spots in Iowa for those who want to explore the state’s early history, but fewer people know about the hiking opportunities in the area. There’s a secret boardwalk hiking trail in Effigy Mounds, hidden off the beaten path from the rest of the monument, that offers stunning views and wildlife viewing opportunities. At only 0.8 miles for an easy out-and-back trail, the Yellow River Bridge Trail is a true hidden gem, so why not join us for a hike?

Effigy Mounds is a stunning place, rich in history and worth spending an entire day exploring.
Archbob/Wikipedia
However, many people visit and pay little attention to the Yellow River, which runs alongside many of the most famous parts of the national monument.
Jill Gibbon/AllTrails
The best way to explore it is via the Yellow River Bridge Trail, a 0.8 mile out-and-back trail along a boardwalk.
Ginger Gese/AllTrails

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Along the way, you'll spot placards explaining the history and ecosystem of the region.
M.O./AllTrails
The terrain changes a bit along the way, but it's always even, well-maintained, and suitable for beginner hikers.
Jill Gibbon/AllTrails
It's also considered the best wildlife-spotting area in all of Effigy Mounds, so bring your camera!
Wayne Booth/AllTrails
The trail will take the average hiker less than half an hour, but it's full of surprises and hidden beauty - another secret kept faithfully by Effigy Mounds National Monument.
Connor Rehbein/AllTrails

Have you ever explored the Yellow River Bridge Trail? Tell us what you thought of this secret hiking trail in Effigy Mounds National Monument in the comments section. More details on the Yellow River Bridge Trail can be found on AllTrails, and you can visit the official NPS Effigy Mounds page for more info on the park. Consider signing up for AllTrails Plus if you’re an avid hiker – the interactive trail maps and other features can be incredibly useful in remote areas.

Want to know more about the surrounding area? Check out our previous coverage of Harpers Ferry, one of Iowa’s best tiny towns.

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Effigy Mounds National Monument, 151 IA-76, Harpers Ferry, IA 52146, USA