Bigger than some states, Lake Michigan is a large Great Lake that borders Chicago.
Ley lines with heavy concentrations of dark energy run through both North and South Manitou Island in the north of Lake Michigan, and the secret islands in the lake's center, including Demonreach. Another ley line runs directly beneath the Field Museum in Chicago.
In the seriesEdit
In Fool Moon, Harry Dresden tracked Tera West's blood to an abandoned department store in the neighborhood around the University of Chicago off 55th Street near Lake Michigan around the Hyde Park area. Based on a tip from Roger Harris, Dresden went to investigate the Full Moon Garage one block from the Forty-ninth Street Beach on the Lake. He discovered it was the hideout of the Streetwolves led by Parker and was nearly killed.
In Summer Knight, Harry Dresden and two changelings—Lily and Fix— and Billy Borden and a dozen Alphas in wolf form followed the Gatekeeper's stone to the end of a pier on the Lake. There they found a translucent stairway make of congealed starlight as bright as moonlight. They climbed up into a dark swirling storm to Chicago-over-Chicago and onto a rolling hill at the Valley of the Stone Table and into the midst of a war raging between the Summer and Winter Faerie Courts. Their purpose is to stop Aurora and save Lily and incidentally save the planet from an eco-tragedy.
In Death Masks, Harry Dresden goes to the harbor to investigate the Estranger, a ship that he suspects implicated in the whereabouts of the thieves of the Shroud of Turin. While confronting Anna Valmont and Francisca Garcia, the Denarian called Deirdre Archleone shows up in an attempt to take the Shroud from them, killing Garcia sinking the Estranger in the process. Anna Valmont takes off with the Shroud.
In Dead Beat, Harry Dresden and Mouse drove north out of the city to a more out of the way spot on the Lake to summon the Leanansidhe. However, Mab answered the call instead since Lea is "tied up at the moment". Dresden asks about the Erlking and why the Heirs of Kemmler would be seeking the book about him: "Die Lied der Erlking". She asks him to the her Winter Knight and take up the Mantle for the second time, which Dresden declines. Later, Dresden reanimates Sue the T-Rex at the Field Museum of Natural History and rides her along Lake Shore Drive all through the North Side up to Evanston.
In Proven Guilty, Madrigal Raith posing as Darby Crane, abducted Harry Dresden and Henry Rawlins with the assistance of Lucius Glau and brought them to the Full Moon Garage one block from the Forty-ninth Street Beach. Madrigal tried to sell Dresden on eBay to Arianna Ortega of the Red Court, one of Dresden's biggest enemies. Dresden and Rawlins escaped through the same hole under the wall that Dresden escaped under the last time from the Streetwolves.
In White Night, Harry Dresden and Elaine Mallory searched for Olivia on Dresden's brother, Thomas's boat, the Water Beetle. Thomas was using the boat to shelter and move practitioners he is protecting to safety. Some of the women are from Ordo Lebes. They are attacked by Madrigal Raith and many ghouls. Dresden draws the heat from Lake Michigan causing ice to form so the women and children can escape from the boat under siege over the ice to a far dock.
In Small Favor, Harry Dresden, Jared Kincaid, and the Archive, meat with Nicodemus Archleone and the Denarians at the Shedd Aquarium to negotiate Marcone's release. After the Denarians kidnapped Ivy, Luccio got a Ley line map that they used to determine both how the Denarians had empowered a Greater Circle] and where they might be. Dresden went to rescue Ivy and Marcone from the Denarians on Demonreach with Michael Carpenter and Sanya and with Thomas and Murphy on the Water Beetle for a back-up rescue team. 
In Cold Days, Harry Dresden , Molly Carpenter, and Thomas Raith take the Water Beetle to Demonreach to find out why a it's about to explode and determine how to stop it. Returning from Demonreach island, they were attacked by Redcap and his gang of Sidhe on jet skis. Molly Carpenter stated that the Leanansidhe taught her the locations of Ley line nodes around Lake Michigan a few months prior. Dresden gave the map to her to mark.
"She pointed up toward the north end of Lake Michigan. "North and South Manitou Islands both have heavy concentrations of dark energy running through them."[...] Her fingertip came to rest on a cluster of tiny islands out in the center of the lake, northeast of the city, and the heavy, dark purple line running through it."(reference needed)
- ↑ 1.0 1.1 Small Favor, ch. 39
- ↑ Storm Front, ch. 4
- ↑ Fool Moon, ch. 5
- ↑ Fool Moon, ch. 9
- ↑ Summer Knight, ch. 30
- ↑ Death Masks, ch. 12-14
- ↑ Dead Beat, ch. 21
- ↑ Dead Beat, ch. 39
- ↑ Proven Guilty, ch. 27
- ↑ White Night, ch. 20 & 21
- ↑ Small Favor, ch. 28-34
- ↑ Small Favor, ch. 40-45
- ↑ Turn Coat, ch. 35
- ↑ Turn Coat, ch. 38
- ↑ Changes, ch. 49
- ↑ Cold Days, ch. 14
- ↑ Turn Coat, ch. 18
- ↑ Cold Days, ch. 28
- Burnham Harbor
- Water Beetle
- Ley lines
- Shedd Aquarium