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Rockport State Park Sinkhole Loop route map
Difficulty: ModerateLoop

Rockport State Park Sinkhole Loop

Alpena, Michigan

6.4 mi

Distance

653 ft

Elev. Gain

2h 16m

Est. Time

Loop

Route Type

Moderate

Difficulty

About This Trail

Rockport State Park Sinkhole Loop is a loop trail in Rockport Recreation Area, managed by the Michigan Department of Natural Resources, in Alpena County, Michigan. It is 6.4 miles long. The nearest town is Alpena, Michigan, about 8 miles away in a straight line.

From the trail data on this page. For conditions and closures, see official sources.

Trail Conditions

Trail Conditions

Unknown

We have no current condition data for this trail. Check with the operator before you go, and submit a report below if you've been recently.

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Elevation Profile

Min:177 ft
Max:202 ft
Gain:199 ft
Loss:199 ft
Elevation profileA line rising and falling between 177 ft and 202 ft across 6.3 mi along the route, drawn from start to end.177 ft185 ft194 ft202 ft0.0 mi1.6 mi3.2 mi4.8 mi6.3 mi

Elevation at the labelled points along this route
PointDistance from startElevation
Start0.0 mi177 ft
High point4.3 mi202 ft
End6.3 mi177 ft

Trail Details

Route Type
Loop

Official sources & verification

Managed by Michigan Department of Natural Resources

Verify before you go

Source of truth

Where it is

Nearest town:
Alpena, MI · about 8 mi away
County:
Alpena County, MI
Jurisdiction:
Rockport Recreation Area · Michigan Department of Natural Resources

Nearest town and county from U.S. Census Bureau place records and county boundaries.

Verify by phone or mail

We display cached information from agency feeds. Hours, fees, permits, closures, fire restrictions, and conditions change without notice. Outdoors is not the permitting authority. Confirm current conditions for this trail using the links above before you go — you are responsible for compliance. Last verified by us: May 23, 2026. Our copy is more than a month old — please reconfirm with the agency before relying on it.Spot an error in our data?

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Legacy import — verify before navigating

Path geometry came from our pre-launch legacy database. Routes have not yet been re-verified against the operator and may differ from the actual trail.

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