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Amazing Feats

The Longest Anyone Has Stayed Awake

The longest recognized time without sleep is nearly 19 days, not the famous 11. Here's the record history and what sleeplessness does.

By Written Facts StaffOctober 18, 20268 min read

You know what it's like to be up past 3 a.m. after a red-eye flight, a newborn's night or a deadline. The words on the screen start to swim. Now picture going on like that for more than two weeks. The longest stretch without sleep that Guinness World Records ever recognized is 453 hours and 40 minutes, almost 19 days, set by Robert McDonald in 1986. The case most people know, Randy Gardner's 11 days in 1964, is the best documented. It is not the longest.

The short answer

Today there is no official record for staying awake. Guinness World Records says it stopped monitoring the "longest time without sleep" category in 1997. The last holder it recognized was Robert McDonald, with 453 hours 40 minutes (18 days, 21 hours and 40 minutes) in 1986. Nobody is known to have beaten that since. Since Guinness no longer accepts attempts, nobody can officially beat it either.

The number most people have heard is "11 days." That comes from Randy Gardner, a San Diego high school student who stayed awake for about 264.4 hours, or 11 days and 25 minutes, from December 1963 into January 1964. Some sources give 24 minutes instead of 25, and some give a different year, but the 264-hour figure is consistent. Gardner's attempt is famous because it was watched closely, written up by scientists and retold for decades. Later people claimed longer stretches, and Guinness listed several of them.

So the precise answer has two parts. The longest recognized record is McDonald's, at nearly 19 days. The best-documented case is Gardner's, at 11 days. To see how those two facts fit together, start with the teenager.

Randy Gardner, 1963–64

Gardner was 17. He had read that Tom Rounds, a Honolulu radio host, had reportedly stayed awake for 260 hours, and he set out to beat it as a science fair project. Two classmates, Bruce McAllister and Joe Marciano Jr., ran the project with him. They kept a log, kept him moving and kept him talking. According to McAllister, the boys first considered studying sleep loss and "paranormal ability," then switched to measuring thinking and physical performance.

The project soon drew professional attention. William Dement, a Stanford sleep researcher, came down to observe. Lt. Cmdr. John J. Ross, a Navy medical researcher, monitored Gardner's health. Guinness, as quoted in later reports, says Gardner used no stimulants except Coca-Cola, loud music and cold showers.

The days did not go smoothly. Gardner later described hallucinations beginning around day four, along with memory lapses. He also said he briefly believed he was Paul Lowe, a running back for the San Diego Chargers. On day five, according to one account, he saw a forest path where his home should have been. His speech slowed. On day 11 he was asked to count backward from 100 by sevens. He stopped at 65 and said he had forgotten what he was doing.

Recovery was surprisingly quick. Gardner slept for 14 hours and 46 minutes (NPR says "just over 14 hours"). He then stayed up until the next evening and slept about 10.5 hours more. He was monitored for several nights afterward, and his sleep, heavy at first in REM sleep, gradually returned to normal. He did not pay back the hours he had lost one for one.

The record ladder

Gardner was one entry in a run of attempts, and the history is full of mix-ups. In 1959 Peter Tripp, a New York disc jockey, stayed awake about 201 hours in a glass booth in Times Square to raise money for the March of Dimes. Guinness's own table, published in 2023, lists these holders:

1959: Dave Hunter, 225 hours
1959: Tom Rounds, 260 hours
1964: Randy Gardner, 264 hours
1969: Bertha Van Der Merwe, 282 hours 55 minutes
1974: Roger Guy English, 288 hours
1977: Maureen Weston, 449 hours
1986: Robert McDonald, 453 hours 40 minutes

Not every claim is on that list. Toimi Silvo of Hamina, Finland, reportedly stayed awake for 276 hours in February 1964, only weeks after Gardner. His surname is sometimes spelled Soini, and sources disagree on whether Guinness ever carried his claim. Sources also disagree on whether Gardner was printed in the book at the time. Gardner himself said he "missed the publication date."

Maureen Weston of Peterborough, England, set her mark during a rocking-chair marathon from April 14 to May 2, 1977. One widely copied figure gives "449 hours (14 days 13 hours)," which doesn't add up: 449 hours is 18 days and 17 hours, which matches Guinness and her dates.

Then there is Tony Wright of Cornwall. In May 2007 he reportedly stayed awake for 266 hours, believing Gardner's 264 was the record to beat. Weston and McDonald had gone far longer decades earlier, and by then Guinness had stopped accepting the category. Wright's two extra hours set no record.

Why Guinness stopped counting

Guinness gives a few reasons for retiring the category. The first is health. Going without sleep harms both body and mind, and a record category rewards people for pushing that harm further. In a 2024 article on records it has "rested," Guinness again listed this one, citing the dangers.

The second reason is measurement. Someone who seems awake can still slip into microsleeps, brief lapses that can last only seconds. Spotting them reliably requires continuous recording of brain activity. A team of friends with a logbook cannot tell whether a person nodded off for four seconds at 3 a.m. on day nine.

The third reason is that the category draws claims that can't be checked. Guinness notes that a person with fatal familial insomnia, a rare inherited disorder that destroys the ability to sleep, could in theory become a "record holder" without trying. It also points to Valentine Medina, who claimed not to have slept since 1904. Guinness did not give him a record because the claim could not be verified.

Together, these reasons left the category without a safe or checkable way to keep going. That leaves the more interesting question of what all those hours actually did to the people who tried.

What sleeplessness does

Peter Tripp's 1959 stunt is the cautionary tale. He was irritable by day three. Later he saw things that weren't there, such as cobwebs and mice, and at one point insisted he was an impostor rather than himself. When it ended, he slept 13 hours and 13 minutes. Accounts say his last 66 hours were spent under drugs given by the doctors observing him, so his experience was not pure sleep loss.

Gardner's case produced an expert disagreement that never fully went away. Ross reported moodiness, poor concentration, short-term memory loss, paranoia and hallucinations. Dement, by contrast, noted that Gardner beat him at pinball on day 10. He concluded that the stay caused no psychiatric problems. Gardner later summed it up for NPR: "Physically, I didn't have any problems... But the mental part is what went downhill." In 2017 he said he had suffered serious insomnia beginning around 2007, which he blamed on the experiment. Whether the two are connected cannot be settled from one person's history.

The strangest finding may explain how he lasted at all. Later accounts say that while Gardner looked awake, parts of his brain were "catnapping," with some regions briefly resting while others stayed active. McAllister put it this way: "Parts of it could catnap and restore – while parts of it were awake." Later animal research has pointed the same way, showing small groups of brain cells switching off while the rest of the animal stays active. This also undercuts every record on the list, Gardner's included. A person can look awake while part of the brain is asleep.

All of these attempts involved one person at a time, with no control group, so they are memorable stories more than proof. Most people come no closer to them than an all-nighter before Thanksgiving travel or a long Halloween night, and that much is enough to feel the first symptoms on Tripp's list.

Sources (10)

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