Donner Lake is a glacially carved alpine lake nestled in the Sierra Nevada mountains of California, sitting at roughly 5,900 feet elevation near the town of Truckee. The lake — originally known as Truckee Lake — is best known as the site where the majority of the ill-fated Donner Party became snowbound during the catastrophic winter of 1846–47, unable to push through the mountain summit into California. Visitors today can explore the Donner Memorial State Park on the lake's eastern shore, where a towering monument marks the approximate depth of the historic snowpack, and a preserved remnant of one of the emigrant cabins still stands. In Season 10 of Expedition Unknown, Gates traveled to the lake to investigate both the well-known horror and the largely forgotten heroism of the Donner Party story, meeting with historians and extreme athletes retracing the settlers' route in winter conditions.
The Donner Party departs the Midwest for California, taking a fateful shortcut that delays their progress through the Sierra Nevada.
More than 80 emigrants become trapped at Truckee Lake (now Donner Lake) through the brutal winter, leading to starvation and, for some, cannibalism. Rescue parties eventually extract survivors in early 1847.
Spring rescuers recover the remains of those who did not survive the winter, including, according to the episode, the bones of snowblind Charles Stanton.
Gates films S10E13 'Donner Party Horror and Heroes,' joining historians and extreme athletes retracing the Donner Party's route in search of the so-called 'camp of death.'
Historian Frank Mullen, whom Gates meets at Donner Lake, is among the researchers who have worked to reframe the Donner Party narrative — arguing that the story's fixation on cannibalism has overshadowed the remarkable survival efforts, rescue missions, and individual acts of courage that also defined the episode. The episode highlights figures like Charles Stanton, who reportedly went snow-blind and whose bones were later found by rescuers in the spring, as emblematic of a deeper, more complicated human story that popular retellings have tended to flatten.
Mainstream historians broadly agree that the Donner Party disaster resulted from a combination of factors: the decision to take the Hastings Cutoff shortcut, an unusually severe Sierra Nevada winter, internal group conflicts, and a series of cascading misfortunes that Gates' episode captures in the phrase 'everything possibly that could go wrong, went wrong.' The lake sits just below the Sierra summit, and the emigrants' inability to cross that final obstacle — despite repeated attempts — was ultimately fatal for roughly half the group.
What remains genuinely debated among researchers is the precise geography of key events, including the location of the so-called 'camp of death' where the cannibalism is believed to have occurred. The episode's suggestion that investigators may have pinpointed this site, or uncovered something 'lost to history' near it, is presented as a working hypothesis rather than a confirmed finding — consistent with Gates' investigative, evidence-respecting approach.
The Expedition Unknown episode appears to contribute meaningfully to public awareness of the rescue effort's scale and the human complexity behind the tragedy, situating Donner Lake not just as a place of horror but as a place where, as Gates frames it on camera, 'the human instinct to survive' was on full display. Whether any physical discovery made during filming will hold up to further scholarly scrutiny remains to be seen.
The lake was originally called Truckee Lake; it was later renamed Donner Lake in memory of the stranded party.
According to the Expedition Unknown episode, investigators contend that 30 feet of snow blanketed the Sierra Nevada during the winter of 1846–47, making escape effectively impossible once the storms set in.
The Donner Memorial State Park monument is said to be built to a height representing the depth of the snowpack that winter — a striking visual reminder of the conditions the emigrants faced.
The Donner Party's story became, in the episode's words, 'lurid national news' almost immediately, and the sensationalized account has dominated public memory for roughly 175 years, according to historians featured in the episode.
Donner Memorial State Park, on the eastern shore of Donner Lake near Truckee, California, is generally accessible to visitors and includes a museum, the historic cabin remnant, and monument grounds. Visitors should check current California State Parks advisories for seasonal hours and road conditions, particularly in winter when snow can affect access.
Truckee, California, is the nearest town and lies approximately 2–3 miles from the lake; Reno, Nevada, is roughly 35 miles to the east.
Late spring through early fall offers the most reliable access and pleasant conditions, with summer months drawing the most visitors. Winter visits can be evocative given the site's history, but mountain weather can be severe and access routes may require chains or be temporarily closed.