Island Lake is a remote alpine lake located in the Valdez-Cordova County region of Alaska, situated within the Coghill River drainage system at approximately 61°09'N, 147°82'W (Copper River Meridian). This backcountry waterbody sits at elevation within the Chugach National Forest area, accessible via the Anchorage A-3 quadrangle. The lake serves as an important fisheries resource, documented for coho salmon rearing and sockeye salmon spawning and rearing activities. The presence of these anadromous fish populations indicates the lake maintains suitable water quality and temperature conditions year-round, with sufficient depth to support overwintering salmon.

Access to Island Lake requires significant planning and backcountry skills. There are no road approaches to this location; access typically involves either floatplane charter or an extended backpacking trek through challenging terrain. The surrounding landscape consists of steep mountainous terrain typical of the Chugach Range, with dense vegetation at lower elevations transitioning to alpine tundra and exposed rock at higher elevations.

Paddlers should be prepared for cold water temperatures, unpredictable mountain weather, and complete self-sufficiency. The remote nature of this location means no facilities, emergency services, or communication infrastructure exists nearby. Wildlife in the area includes brown bears, which are attracted to salmon-bearing waters, requiring proper food storage and awareness protocols. The lake's glacially-influenced watershed may result in turbid water conditions during warmer months when snowmelt and glacial runoff peak. Wind patterns can develop quickly in mountain lake settings, creating challenging paddling conditions with whitecaps and waves that pose hypothermia risks.

Given the lake's designation in the Anadromous Waters Catalog, certain activities are regulated by Alaska Department of Fish and Game to protect salmon habitat. This pristine setting offers experienced wilderness paddlers a true Alaskan backcountry experience, but demands proper equipment, bear safety knowledge, and wilderness navigation skills.