Question: When did the gold rush start in the state of Tana Glacier?

full_context: Document 1: Alatna River: The river is very popular for float trips due to its calm flow and wonderful scenery. Float trips usually take from four to fourteen days, depending on put-in spot and pick-up spot, and also weather/river conditions. One common place to put in is Circle Lake, a small lake which is float plane accessible and is located in a beautiful part of the valley. Another place to put in is Takahula Lake, a larger, float-plane accessible lake, further downstream from Circle Lake. Gaedeke Lake is also a possible put in spot, but according to the "Alaska River Guide", this upstream section near the headwaters of the river is shallow and rocky making portaging or lining necessary. Most floaters take out at the village of Allakaket.
Document 2: Montana: The northern section of the Divide, where the mountains give way rapidly to prairie, is part of the Rocky Mountain Front. The front is most pronounced in the Lewis Range, located primarily in Glacier National Park. Due to the configuration of mountain ranges in Glacier National Park, the Northern Divide (which begins in Alaska's Seward Peninsula) crosses this region and turns east in Montana at Triple Divide Peak. It causes the Waterton River, Belly, and Saint Mary rivers to flow north into Alberta, Canada. There they join the Saskatchewan River, which ultimately empties into Hudson Bay.
Document 3: Virginia City, Nevada: Virginia City sprang up as a boomtown with the 1859 discovery of the Comstock Lode, the first major silver deposit discovery in the United States, with numerous mines opening. At the city's peak of population in the mid-1870s, it had an estimated 25,000 residents. The mines' output declined after 1878, and the city itself declined as a result. As of the 2010 Census the population of Virginia City was about 855, and that of Storey County 4,000.
Document 4: Tana Glacier: Tana Glacier is a 17-mile-long (27 km) glacier in the U.S. state of Alaska. It begins at Bagley Icefield and flows northwest to its 1950 terminus near the head of the Tana River. Its name, of Alaska Native origin, was first recorded by prospectors in 1900.
Document 5: Grand Forks, Yukon: Grand Forks is a ghost town and former community at the confluence of Bonanza Creek and Eldorado Creek in Yukon. First settled about 1896, it became the second-largest settlement in the Klondike. With approximately 10,000 people lived in or by Grand Forks during the Klondike Gold Rush, it was the only community besides Dawson City to have a municipal government. The Grand Forks Hotel was a roadhouse here during the gold rush.
Document 6: Klondike Gold Rush: From 1898, the newspapers that had encouraged so many to travel to the Klondike lost interest in it. In the summer of 1899, gold was discovered around Nome in west Alaska, and many prospectors left the Klondike for the new goldfields, marking the end of the rush. The boom towns declined and the population of Dawson City fell. Gold mining activity lasted until 1903 when production peaked after heavier equipment was brought in. Since then the Klondike has been mined on and off, and today the legacy draws tourists to the region and contributes to its prosperity.
Document 7: Seattle: The second and most dramatic boom and bust resulted from the Klondike Gold Rush, which ended the depression that had begun with the Panic of 1893; in a short time, Seattle became a major transportation center. On July 14, 1897, the S.S. Portland docked with its famed "ton of gold", and Seattle became the main transport and supply point for the miners in Alaska and the Yukon. Few of those working men found lasting wealth, however; it was Seattle's business of clothing the miners and feeding them salmon that panned out in the long run. Along with Seattle, other cities like Everett, Tacoma, Port Townsend, Bremerton, and Olympia, all in the Puget Sound region, became competitors for exchange, rather than mother lodes for extraction, of precious metals. The boom lasted well into the early part of the 20th century and funded many new Seattle companies and products. In 1907, 19-year-old James E. Casey borrowed $100 from a friend and founded the American Messenger Company (later UPS). Other Seattle companies founded during this period include Nordstrom and Eddie Bauer. Seattle brought in the Olmsted Brothers landscape architecture firm to design a system of parks and boulevards.
Document 8: Pike's Peak Gold Rush: The participants in the gold rush were known as ``Fifty - Niners ''after 1859, the peak year of the rush and often used the motto Pike's Peak or Bust! But in fact the location of the Pike's Peak Gold Rush was 85 miles (137 km) north of Pike's Peak. It was only named Pike's Peak Gold Rush because of how well known and important Pike's Peak was.
Document 9: Glacier View, Alaska: Glacier View is a census-designated place (CDP) in Matanuska-Susitna Borough, Alaska, United States. It is part of the Anchorage, Alaska Metropolitan Statistical Area. At the 2010 census the population was 234, down from 249 in 2000. The terminus of Matanuska Glacier is located approximately three miles southwest of Glacier View.
Document 10: Riggs Glacier: It was named by the American Geographical Society in 1947 for Thomas Riggs, Jr., Governor of Alaska from 1918 to 1921.
Document 11: Alaska: Starting in the 1890s and stretching in some places to the early 1910s, gold rushes in Alaska and the nearby Yukon Territory brought thousands of miners and settlers to Alaska. Alaska was officially incorporated as an organized territory in 1912. Alaska's capital, which had been in Sitka until 1906, was moved north to Juneau. Construction of the Alaska Governor's Mansion began that same year. European immigrants from Norway and Sweden also settled in southeast Alaska, where they entered the fishing and logging industries.
Document 12: Yahtse Glacier: Yahtse Glacier is a 40-mile-long (64 km) glacier in the U.S. state of Alaska. It begins on the southeast slope of Mount Miller and trends southeast along the north border of Guyot Glacier to Icy Bay, just east of Guyot Hills and 70 miles (113 km) northwest of Yakutat. The western extent is an icefield. The name derives from the Yahtse River and was adopted after the retreat of Guyot Glacier resulted in a separate branch.
Document 13: Little Susitna River: Little Susitna River heads at Mint Glacier on Montana Peak, in Talkeetna Mountains at , flows southwest to Cook Inlet, west of Anchorage, Alaska Cook Inlet Low.
Document 14: Trench Glacier: Trench Glacier () is a deeply entrenched glacier extending along the east coast of Alexander Island, Antarctica, 6 nautical miles (11 km) long and 2 nautical miles (3.7 km) wide, which flows east into the George VI Ice Shelf that occupies George VI Sound immediately south of Mount Athelstan. The mouth of this glacier was first photographed from the air on November 23, 1935, by Lincoln Ellsworth, and it was mapped from these photos by W.L.G. Joerg. Trench Glacier was surveyed in 1948 and 1949 by the Falkland Islands Dependencies Survey, who applied this descriptive name.
Document 15: Yukon: Yukon's historical major industry was mining (lead, zinc, silver, gold, asbestos and copper). The government acquired the land from the Hudson's Bay Company in 1870 and split it from the Northwest Territories in 1898 to fill the need for local government created by the population influx of the gold rush.
ground_truth: the summer of 1899
sub_queries: What state is Tana Glacier located? Answer: Alaska
when did the gold rush start in Alaska Answer: the summer of 1899