Sleeping Bear Dunes National Lakeshore occupies a thirty-five-mile stretch of the northwest Michigan Lake Michigan coast from Empire north to Good Harbor Bay, plus the North and South Manitou Islands offshore. Chris Izworski tracks it as a distinct sub-region within the broader northwest Michigan coast because the federal land status, the perched-dune geology, and the National Lakeshore's role as the single most visited Great Lakes shoreline destination give it a property-owner and management profile that differs sharply from the surrounding private-shoreline coast.
Sub-region: Sleeping Bear Dunes National Lakeshore, Leelanau and Benzie Counties, Michigan.
Federal land: roughly 71,000 acres including mainland and the North and South Manitou Islands.
Major access points: Empire, Glen Arbor, Pyramid Point, Pierce Stocking Drive.
Lake datum: 577.50 feet IGLD85, the Lake Michigan-Huron datum.
Anchor years: 1986 cycle high, 2013 modern low, 2020 record monthly high at 581.70 feet.
Federal jurisdiction: National Park Service, Sleeping Bear Dunes National Lakeshore.
The basinwide Lake Michigan-Huron level on the homepage applies along the National Lakeshore. The Sleeping Bear coast faces west and northwest into the full open-water fetch of upper Lake Michigan, which produces an aggressive wave climate during fall and winter storm seasons. The perched dunes that give the National Lakeshore its name sit on top of glacial moraine bluffs that rise 400 feet above the lake at the highest point. Water level affects this coast in two ways: directly through beach narrowing and lower-bluff erosion, and indirectly through the moisture and freeze-thaw cycles that govern the longer-term stability of the perched-dune complex.
The 2019 and 2020 high water cycle drove substantial beach narrowing along the National Lakeshore and accelerated lower-bluff retreat in several segments. The Dune Climb area, which is the most visited feature in the park, did not experience the same rate of change because of its setback from the open water, but the lakeshore segments near Empire, Sleeping Bear Bay, and Pyramid Point all showed measurable shoreline change through the cycle.
The Empire and Empire Bluffs area at the south end of the National Lakeshore includes the town of Empire (a private in-holding adjacent to the park), Empire Bluffs, and the south end of the perched-dune complex. The Empire Bluffs trail offers one of the clearest views of the perched-dune geology in the park.
The Sleeping Bear Bay coast from Empire north to Glen Arbor includes the Dune Climb, Pierce Stocking Scenic Drive, and the Sleeping Bear Plateau itself. The Plateau is the perched-dune mass that gives the park its name and the feature that draws the largest single share of visitor traffic. The narrow beach below the Sleeping Bear bluff is one of the most photographed shoreline features in the park and one of the most dynamic in response to lake level and storm cycles.
The Glen Lake and Glen Arbor area includes the town of Glen Arbor, the inland-lake complex of Big Glen Lake and Little Glen Lake, and the Crystal River and Pyramid Point coast north of Glen Arbor. Property concerns in this section combine the Lake Michigan shoreline coverage of the National Lakeshore with the inland-lake shoreline of Glen Lake and the smaller surrounding lakes, which have their own dynamics tied to the Crystal River outlet.
The Manitou Islands sit offshore from Sleeping Bear Bay and are part of the National Lakeshore. North Manitou Island is roughly 15,000 acres and accessible by ferry from Leland. South Manitou Island is smaller and also accessible by ferry. Both islands have substantial shoreline within the National Lakeshore boundary, with the offshore exposure producing different shoreline dynamics than the mainland coast.
Federal land status within the National Lakeshore removes most private-shoreline regulatory questions for the park itself, but the in-holdings, the adjacent private property at Empire and Glen Arbor, and the inland-lake shorelines on Glen Lake and Crystal Lake all operate under Michigan EGLE NREPA jurisdiction. The Michigan OHWM at 581.5 feet IGLD85 applies to Lake Michigan shoreline within the park, with the additional layer of National Park Service management for federal-shoreline considerations.
The most distinctive consideration for shoreline within and adjacent to the National Lakeshore is the interaction between the visitor management mandate of the National Park Service and the dynamic shoreline character of the perched-dune complex. The Park Service has chosen in many cases to allow the shoreline to evolve naturally rather than intervene with hardened shoreline protection, which preserves the dynamic shoreline character that defines the visitor experience but does mean that visitor access patterns at popular beach segments change in response to lake-level cycles.
For a current reading, see the live dashboard. For broader Lake Michigan context, see Lake Michigan. For neighboring Lake Michigan sub-regions, see Northwest Michigan, Beaver Island, and Southwest Michigan. For Mackinac and the Lake Huron transition, see Mackinac.