The Muddy Creek Valley, on the western edge of Grand County, has a rich history, mostly based on ranching. It became something of a multi-cultural region, attracting French, Greek, Belgian, British, Dutch, Austrian, Swiss, German and Jewish settlers.  There were also dozens of homesteading families that came from eastern Colorado and Mid-West America.

The known prehistory of the Muddy Creek area extends back 10,000 years at a kill site for bison on Twin Peaks, which separates the Muddy from the Troublesome Creek drainages. 

Among the early settlers in the region were the Ed Pinney family who has a ranch near the summit of Gore Pass.  As the boundary between Grand and Routt County was not well defined, Ed paid his taxes to whichever county had the lowest rate in any given year.  After the railroad arrived at Kremmling, a stage coach route to Topanos, west of Gore Pass, was started.  At first the Pinney Ranch was designated a lunch stop, and then an overnight stop.  In 1906, the Pinneys' built a big house that could accommodate up to 40 people, two to a room.

One of the many notable ranches was that of Fred and Myrtle DeBerard.  Their Park Ranch included 20,000 acres, and they ran over 1600 registered Herefords.  Fred was instrumental in the creation of four reservoirs in the region.

Another prominent early rancher was Frenchman Alfred Argualer, who first came to hunt the region but returned to establish the May-Be-So Ranch.  He continued developing properties from 1880 until 1911 when he sold his ranch on the Muddy to Nick "Turk" Constantine.

A significant rancher of the 20^th century was Walter "Wad" Hinnan, who served form 1966-7 as President of the Colorado Cattlemen's Association and as Director of the National Western Stock Show in Denver.  He was instrumental in breaking the barrier between cattlemen and sheep growers by showing that both enterprises could be complimentary and profitable.  Wad also represented Grand County in the Colorado Legislature from 1968 to 1982.

At one time in the early 1920's there was a sanatorium for World War I veterans who had been disabled by mustard gas.  The lower Muddy was the site of an ice house which supplied refrigeration for fruit shipments out of Grand Junction and Palisade, Colorado.  German prisoners of war were used to cut the ice during World War II.

A unique innovation resulted from the widespread ranching families.  In 1935, the schoolhouse was put on sled runners so that it could be taken to which ever ranch had the most children for that season.  It was moved in the winter as the school terms were held during the summer.  It was moved three times between 1931 and 1939 and was probably the only mobile schoolhouse of that era.  

The first settlers in Granby realized the sunny days and cool nights were perfect for growing one crop in particular, lettuce. Lettuce farming boomed in the 1920's and a new industry was born. Granby had become an important railway center as tracks were laid over the Divide at Rollins Pass,giving the Moffat Railroad access to Salt Lake City.

Granby produced some of the best-known lettuce in America. There are even tales that New York's Waldorf-Astoria Hotel bragged of their “Granby Lettuce” on the menu. Then a blight settled into the soil, probably brought in by the wooden crates used for shipping, and the lettuce business was ruined. Since then, ranching has replaced agriculture as Granby's major industry.

The original Grand County contained North Park as well as Middle Park, and during the mining boom of the early 1880's there were several mining camps east of the modern town of Rand. It was several years after the mining boom northern area of Jackson County was created.

Teller City was founded in 1879 and named for Colorado's famous Senator Henry M. Teller, who later became U.S. Secretary of the Interior.  By 1882, the population of Teller City was about 1200.  It had a fine hotel with 40 rooms, a newspaper and two steam saw mills.  It was a lively Old West town with twenty seven saloons and a number of "houses of ill repute".

Some high quality ore assayed at Teller City was as much as $3000 a ton, but most of that soon ran out and by 1884, the high shipping costs to far away smelters dropped the price per ton dropped to $20. The best mine, Endomile, was three miles from town.

Crescent City, southwest of Teller City had an even more brief existence, but there was population enough for a U.S. Post Office in 1880. 

Rumors of valuable silver three miles sough of Teller City drew a number of prospectors to found the camp known as Tyner.  John Noble Tyner was the First Assistant Postmaster General of the United States and visited the mining camp so named in 1879.  He promised the miners a weekly mail delivery if at least 2 miners mined through the winter.  Tyner had been a special agent for the Post Office from 1861 thru 1868, at which time he was appointed to serve in an open seat in the U.S. House of Representatives for Indiana.  He ran for election win the appointed term ended and was elected and continued to be reelected and serve as a Representative until 1875 when President Grant appointed him Second Assistant Postmaster General.  Grant would later appoint him to the "big job" of Postmaster General in 1876. 

Tyner worked to elect Rutherford B. Hayes in 1876 and after Hayes was elected and took office in March of 1877, Hayes appointed a new Postmaster General, but gave the second spot, First Assistant to the Postmaster General to Tyner.  Historians suggest that Tyner's demotion angered him to the point that he allowed wide spread corruption in the day to day operation of the Postal Service which was his responsibility to over see. He resigned in 1881 under great public pressure from what became known as the "Star Route Fraud scandal".  He would remain a political figure  being appointed  various positions  with the U. S. Postal Service until shortly before his death in 1904.  Although indited three times for corruption in his Post Office management, he was never convicted.  The "Star Route Fraud scandal", may have local implications.  It had to do with over charging and providing needless postal routes, roads and post offices and kick backs to politicians from contractors .

In 1938, Grand County decided to establish a library to act as a central reservoir of knowledge for its citizens. The community realized that few people can purchase all of the books and other materials which they may need, and so they agreed to pool their money in the library to build its central collection. At the same time they wanted to be sure that their interests would always be represented in the operations of the library, and so they formed a board of trustees from among themselves.

At about the same time, the federated women's clubs in Granby and Grand Lake, for the same reasons, set up lending libraries in those two communities. Run by the clubs for many years, both were eventually incorporated into the County Library.

In 1994, the Committee to Protect the Library was established to petition the Board of Commissioners to increase funding for the library to set aside a completely separate library fund, which would be administered as a Library District. The voters approved the move on November 8, 1994, and Grand County Library District was formed on January 1, 1995.

Today, the library still serves that same basic function for the community as well as new roles acquired in the intervening years.