The view from Summit Peak 1958’, the highest point in the Porcupine Mountains, overlooks Lake Superior and the park’s extensive old-growth forests. This area was once the scene of explosive volcanic eruptions. Now stands some of the oldest rocks in the Porcupine Mountains which are easily visible here. These rocks lie atop older continental basalts. These rocks were deposited by a large stratovolcano just south and east of the mountains. This form of volcanism is unique in the rift system, which was dominated by flood basalts issuing from long fissures along the rift axis. Some 40 million years after the deposition of the first rift rocks, compressive forces uplifted areas along the margin of the rift, steeply tipping the rock layers. The Porcupine Mountains, the Keweenaw Fault and many other geological features of the Keweenaw region were formed by this uplift.
The Summit Peak trail first travels uphill under a dense hardwood canopy, with benches along the way providing rest stops. Boardwalks and stairs continue the trail to a viewing deck overlooking the Little Carp Valley and then onto the summit. A 40 foot observation tower provides an outstanding view of the park’s extensive backcountry and Lake Superior. From parking lot to tower, the trail climbs 300 feet over 0.5 miles.
Leave No Trace - Leave What You Find - Be Considerate Of Other Visitors - Respect Wildlife
TO LOG THIS CACHE:
1) Using the information from the trailhead waypoint sign (a field guide to bedrock…) and what you observe along your hike to the tower to identify the type of bedrock Summit Peak is made of.
2) How far is the Apostle Islands National Lakeshore from this viewpoint?
3) Photograph of you on top of the Summit Peak viewing tower.
To log this cache e-mail me the answers HERE
- Michigan Department of Natural Resources Rafferty, M. & Sprague, R: Porcupine Mountains Companion: Inside Michigan's Largest State Park. Pages 194-204. Nequaket Natural History Associates, 2001.
MI DNR Approved