The End

Holliday spent the rest of his brief life in Colorado. After a stay in Leadville, Colorado, he suffered from the effects of the high altitude, and his health and evidently his gambling skills began to deteriorate badly. In August, 1884, he shot Billy Allen, a man who was threatening him with a beating in the collection of a loan to Doc of just five dollars, which Doc didn't have the money to repay. According to his own court testimony, given while pleading self-defense, Doc was then down to just 122 pounds in weight. Allen recovered from his bullet wound, which was to the arm, and the jury ultimately found Doc not guilty.

In 1887, now prematurely gray and ailing badly, Doc made his way to a hotel (the Hotel Glenwood) near the hot springs of Glenwood Springs, Colorado, hoping to take advantage of the reputed curative power of the waters. However, the sulfurous fumes from the spring may have done his lungs more harm than good, and Holliday eventually died in his hotel room, after being bedridden for two months.
In the end, it was tuberculosis that got Doc Holliday, at the age of 36. Fifteen years after the doctors gave him only months to live, he died peacefully in his hotel bed
Dying, Holliday asked for a drink of whiskey, and his reputed last words were "This is funny." Perhaps he was looking at his bootless feet. No one ever thought that he would die with his boots off, or in bed

Doc Holliday's grave is in Glenwood Springs cemetery. There is dispute about whether he is actually buried in his marked grave, or even in the cemetery itself. He died in deep winter when the ground was frozen and was buried the same day in what was probably a temporary grave. This grave may not have been in the old cemetery, which was up a difficult road on the mountain. It is thus possible his body was never later relocated, but the truth is not known, since no exhumation has been attempted. If Doc is not in Glenwood Cemetery, he may be in somebody's back yard in modern Glenwood Springs city, at a lower altitude.