Granby was settled in 1904 and incorporated the next year. The town was created along the railroad line being built by Denver, Northwestern & Pacific, and was a connection with the stage route to Grand Lake. The Granby site was also chosen because of the dry ground and and good view of the surrounding mountains.

The town was named in appreciation of the services of Denver attorney Granby Hillyer, who worked to lay out the town site. Its central location makes it a natural trade center for east Grand County. Specialty truck farming, principally lettuce, became a major crop for Granby. At the peak of the market, the Waldorf Astoria hotel in New York City proudly advertised Granby Head Lettuce on its menus. Later, after WW II, Granby was called the “Dude Ranch Capital of the World.” Today the town offers a mix of recreational amenities and residential charm.

Kremmling started as a general mechandise store, owned by Rudolph (or Kare) Kremmling, on the ranch of Dr. Harris, located on the north bank of the Muddy River. In 1888, John and Aaron Kinsey had part of their ranch platted, calling the site Kinsey City. Kremmling moved his store across the river from the new site and the town that subsequently developed became known as Kremmling. There was a post office established at Kremmling as early as 1885 and the town was incorporated in 1904. 

The Middle Park Fair was established here in 1912. Famous Western Novelist Zane Grey spent time in Kremmling and, as a result, wrote "Mysterious Rider" in which the area is shown as a classic Western setting.

During World War II the town was the location of a prisoner of war camp where German prisoners cut ice that was shipped by rail to other locations.

The local ranching industry, the presence of the railroad and its strategic location at the confluence of the Colorado River, the Blue River, and Muddy Creek made Kremmling a natural location for a town, which still retains the “Old West“ atmosphere.

Carl Howelsen, a ski jumping champion in his native Norway, came to Denver to pursue a career as a stonemason in the early years of the 20^th Century.  He amused himself and others by demonstrating ski-jumping in the foothills of Denver. 

In 1911, Howelson went to Hot Sulphur Springs, where he taught locals such as Horace Button the art of jumping.  Under Howelson's leadership, the first winter carnival west of the Mississippi Rover was held there on February 10-12.  According to the Middle Park Times, "Never before in the history of the Territory and State of Colorado has such an event even been contemplated, much less held!".

Norwegian immigrants Howelson, Angell Schmidt of Denver and Gunnar Dahles of Williams Fork (Grand County) all staged jumping competitions during the carnival.  There were also skating and tobogganing events and a Grand Ball.  Hot Sulphur Springs continued holding Winter Carnivals annually until World War II, when they were discontinued until the 100th anniversary celebration, called the Grand Winter Sports Carnival scheduled for December 30, 2011-February 11, 2012.

Granby Hillyer was born in Cartersville, Georgia on July 7, 1874. The third of six children, born of Shaler Granby Jr. and Lelia (Holloway) Hillyer, and the grandson of the Rev. Shaler Granby Hillyer, Sr. who was born in Granby, Hartford County, Connecticut. When Granby was 13 years old the Hillyer family moved to Washington, D.C. where Granby graduated from public high school. He then entered government service and at the same time studied at George Washington University, receiving a Bachelors of Law Degree. A postgraduate law degree was awarded in 1896 from Columbia University School of Law. He moved to Colorado in 1898 settling at Lamar (Prowers  County) launching a 40+ year legal career. On June 16, 1900 he married Miss Annie Creaghe, from a prominent southern Colorado pioneer family, and a daughter of an Apache County, Arizona sheriff. To this union were born 3 children St. George Creaghe, Granby Francis Ridgeway Jr., and Helen Edna Dolorine (Jane) later Mrs. Albert Hunt of Boston, Massachusetts.

Granby Hillyer was a member of the Republican Party. He served as Lamar City Attorney, Prowers County Attorney, and Deputy District Attorney. He was also affiliated with the Elks, Masons, Sons of the American Revolution, and Woodmen of the World fraternal organizations.

At 28 years of age, the citizens of Prowers, Baca and Las Animas Counties, elected Granby Hillyer to serve in the 14^th Colorado General Assembly, House of Representatives, making him one of the youngest elected officials in state legislature history. He served one term from 1903-1905. During this tenure he plotted the streets at no cost for the Frontier Land and Investment Companies newest town on the Denver, Northwestern & Pacific Railroad (The Moffat Road). In doing so, Mr. Hillyer was honored by having the Town of Granby, Grand County, Colorado named for him.

Governor Carlson appointed Mr. Hillyer as the Third Judicial District Court Judge, at Trinidad, Colorado from 1914-1916. Her served as the United States Attorney for Colorado from 1922-1925. Afterwards he enjoyed a large private law practice in Lamar and Denver.

In 1928 at Lamar, Granby Hillyer was a speical prosecutor in the "Fleagle Gang Case".  On May 23rd, the First National Bank was robbed, resulting in the loss of four lives.  The case has been credited by the F.B.I. as the first robbery solved from a single fingerprint.

The Denver Post on July 21, 1931 page 9, reported "Granby Hillyer Is Disbarred By Federal Courts." In a decision reached by the United States Circuit Court of Appeals, predicated by a Colorado Supreme Court tribunal, of neglecting the interests of his clients in a number of cases.

Tragedy then struck the Hillyer family twice with the loss of St. George Creaghe in June 1932 and October 1933, Granby Jr. was killed in an automobile accident near Lamar. They both were attorneys. St. George and Granby Jr. were born 16 months apart and passed away 17 months apart. Both funeral services were held at the Immaculate Conception Cathedral in Denver, with the same set of pallbearers for both young men. They were laid to rest at Denver's Fairmount Cemetery. Their father Granby Hillyer, joined his sons on January 2, 1942, passing away at Denver Mercy Hospital, after suffering a heart attack at age 68.

The name Granby also comes from Great Britain, one of the original references was for the "Marquis of Granby," John Manners. A Member of Parliament from 1754 until his death in 1770, he also was a popular army officer and hero of the Seven-Year War 1756-1763, obtaining the rank of Lieutenant General. In 1766, he was named British Commander-in-Chief of the Army. John Manners once had his hat and wig shot off during a cavalry charge, thus leading to the British expression, "to go baldheaded at something." He had his office attacked by the pseudonymous political writer "Junius." The Marquis of Granby resigned most of his offices and died in debt.

Curiously, Granby Hillyer had an uncle and a brother named Junius.