Porcupine Mts Union Spring Trail
  
Trail Distance:
Trail Length: 4 (Miles) with loops ranging from 0.6 to 4 miles.
Features:
Hiking
The Union Spring is the second largest natural spring in Michigan. From the floating dock, view over 700 gallons of clear water bubble out the ground each minute, a subtle yet fascinating sight.
South Boundary Road to Impoundment -- 1.4 miles
Impoundment to Union Spring -- 0.6 miles
Union Spring to Government Peak Trail -- 2 miles
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