Portage Lake in Houghton County spans approximately 9,640 acres (nearly 11,000 acres according to some sources) with a maximum depth of 50 feet, making it one of the largest inland lakes in Michigan's Upper Peninsula. The lake is located in the Keweenaw Peninsula, approximately 10 miles northwest of Houghton.

Multiple public boat launches provide paddling access around the lake, with the majority featuring paved surfaces, public restrooms, and ample parking. The downtown Houghton access site offers a hard-surfaced ramp that accommodates all trailerable watercraft, with 10 large parking spaces adjacent to the launch. Portage Paddle Sports operates from Ray Kestner Waterfront Park on the Portage Canal, offering kayak and paddle board rentals with staff preparation and launch services.

From the rental location, paddlers can expect about a 30-minute paddle to reach the famous Portage Lake Lift Bridge, a notable landmark and destination. The lake connects to the Portage Canal system, providing extended paddling opportunities along waterfront areas accessible by paved bike paths.

The lake supports diverse fish species including lake trout, walleye, northern pike, smallmouth bass, lake sturgeon, rainbow trout, rock bass, yellow perch, splake, and sunfish, indicating good water quality. The surrounding area features dense forests, rolling hills, and scenic vistas characteristic of the Keweenaw Peninsula.

Portage Lake serves as a popular destination for various watercraft throughout the paddling season, with the area known for its natural beauty and outdoor recreation opportunities. The lake's substantial size provides ample space for extended paddling trips, while its connection to the canal system offers route variety for different skill levels and interests.

Winter conditions attract ice fishing, indicating the lake freezes seasonally, making it primarily a spring through fall paddling destination in Michigan's Upper Peninsula climate.