National Parks near Three Rivers Trail, Humboldt County, Iowa Three Rivers Trail Main Page HIGH QUALITY TOPO MAP, CLICK HERE More Information about Three Rivers Trail, Humboldt County, Iowa Nearest metro area is Fort Dodge, Iowa Click here for more outdoors activities near Fort Dodge, Iowa General Camping Information List of nearby National Parks: Mississippi National River & Recreation Area, St. Paul - MN, 138.1 miles away Lewis & Clark National Historic Trail, Omaha - NE, 140.3 miles away Pipestone National Monument, Pipestone - MN, 159.7 miles away Saint Croix National Scenic River, Saint Croix Falls - WI, 174.6 miles away Effigy Mounds National Monument, Harpers Ferry - IA, 212.6 miles away * Distances listed are direct linear distances, actual travel distance may be different. Go to Iowa Outdoors Index