Question: When was the mountain the site of a meeting initiated by President Washington?
About the article "Stone Mountain", section "History".

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Human habitation of Stone Mountain and its surroundings date back into prehistory.
When the mountain was first encountered by European explorers, its summit was encircled by a rock wall, similar to that still to be found on Georgia's Fort Mountain.
The wall is believed to have been built by early Native American inhabitants of the area, although its purpose remains unclear.
By the beginning of the 20th century the wall had disappeared, the rocks having been taken away by early visitors as souvenirs, rolled down the rockface, or removed by the commercial quarrying operation.
The mountain was as well the eastern end of the Campbelton Trail, a Native American path that ran through what is now the Atlanta area.
Europeans first learned of the mountain in 1597, when Spanish explorers were told of a mountain further inland which was "very high, shining when the sun set like a fire."
By this time, the Stone Mountain area was inhabited by the Creek and (to a lesser extent) Cherokee peoples.
In 1790 the mountain was the site of a meeting initiated by President George Washington in hopes of negotiating a peace treaty with the Creek.
Instead a series of wars ensued, and the Creek were forced to cede the land to the state of Georgia in 1821.
In the early 19th century, the area was known as Rock Mountain.
After the founding of DeKalb County and the county seat of Decatur in 1822 Stone Mountain was a natural recreation area; it was common for young men to take their dates on horseback from Decatur to the mountain.
Entrepreneur Aaron Cloud built a 165 foot (50 m) wooden observation tower at the summit of the mountain in 1838, but it was destroyed by a storm and replaced by a much smaller tower in 1851.
Visitors to the mountain would travel to the area by rail and road, and then walk up the 1.1 mile mountaintop trail to the top, where Cloud also had a restaurant and club.
Granite quarrying started at Stone Mountain in the 1830s, but became a major industry following the completion of a railroad spur to the quarry site in 1847.
This line was rebuilt by the Georgia Railroad in 1869.
Over the years, Stone Mountain granite was used in many buildings and structures, including the locks of the Panama Canal, the steps to the East Wing of the United States Capitol and the Imperial Hotel in Tokyo.
In recent years, granite suppliers in Georgia sent stone samples cut from Stone Mountain to the Martin Luther King, Jr. Memorial Foundation to be considered for use in a planned monument in King's honor; the Foundation later chose to use granite imported from China.
Unfortunately, quarrying during earlier periods also destroyed several spectacular geological features on Stone Mountain, such as the Devil's Crossroads, which was located on top of the mountain.
In 1887 Stone Mountain was purchased for $45,000 by the Venable Brothers of Atlanta, who quarried the mountain for 24 more years, and descendents of the Venable family would retain ownership of the mountain until it was purchased by the State of Georgia in the 1950s.
Martin Luther King, Jr. mentioned the monument in his 1963 "I Have a Dream" speech in Washington, D.C., when he said "let freedom ring from Stone Mountain of Georgia!"
During the 1996 Summer Olympics, Stone Mountain Park provided venues for Olympic events in tennis, archery and track cycling.
The venues for archery and cycling were temporary and are now part of the songbird and habitat trail.
The Mountain Grove Campground was located approximately halfway between Bloomsburg and Hazleton.
It was adjacent to the historical community of Mountain Grove, which had a population of 65 in 1880, and was located on the Danville, Hazleton and Wilkes-Barre Railroad.
Most attenders came by railroad came from stations in Catawissa or Hazleton.
The campground had its own railroad station and post office.
The campground's elevation was more than above sea level and it was situated in a wooded grove immediately east of McCauley Mountain and in close proximity to Scotch Valley.
McCauley Mountain protected the site from strong west winds.
Mountain Grove Campground was designed with a layout similar to a miniaturized version of Washington, D.C.
It had a center avenue and five other avenues called A, B, C, D, and E. The center avenue ran from a large tabernacle to a living area for the preachers.
There were also a many tents and sites of cottages in the campground and a large administration building on the site housed a number of offices.
The campground had outdoor fireplaces, which encouraged picnics.
The main hall, which was constructed in 1887, was and had two stories.
According to a local atlas, Mountain Grove Campground was semicircular in shape, with avenues radiating out towards the sides.
An open space for worshiping was on the camp meeting site, and it was surrounded by more tents.
When this area was filled up, more people would set up tents along the avenues that radiated outward from the camp.
The location of the Mountain Grove Campground was chosen was selected for several reasons.
One of these was its proximity to the communities of Hazleton and Bloomsburg.
By road, Bloomsburg and Hazleton were both miles from the campground.
The campground was approachable by road from three directions. 
The name "Catoctin" probably derives from the Kittoctons, an American Indian tribe or clan which once lived between the mountain and the Potomac River.
(Note that a local tradition asserts that "Catoctin" means "place of many deer" in an Indian language.
)Catoctin Mountain is perhaps best known as the site of Camp David, a mountain retreat for presidents of the United States.
It was first used by President Franklin D. Roosevelt in the 1930s, who called it "Shangri-La".
In the 1950s President Dwight Eisenhower renamed it Camp David, after his grandson David Eisenhower.
The resort is extremely well guarded by the United States Secret Service, and only approved guests of the President are allowed into the retreat.
Due to its proximity to Washington, D.C., and its beautiful mountain scenery, Camp David has proven to be a popular weekend "getaway" for many United States presidents, and approximately 1/3 of Catoctin Mountain Park can be closed to the public on short notice. 
Eisenhower National Historic Site was the home and farm of General and President of the United States Dwight D. Eisenhower and Mamie Doud Eisenhower.
Located adjacent to the Gettysburg Battlefield in Cumberland Township, Adams County, Pennsylvania near Gettysburg, Pennsylvania the farm served as a weekend retreat for the President and a meeting place for world leaders.
It was the Eisenhowers' home after they left the White House in 1961.
With its putting green, skeet range, and view of South Mountain, it offered President Eisenhower a much-needed respite from the pressures of Washington.
It was also a successful cattle operation, with a show herd of black Angus cattle.
Some of the more notable of Eisenhower's guests were Soviet Premier Nikita Khrushchev, French President Charles de Gaulle, British Prime Minister Winston Churchill, and California Governor Ronald Reagan. 
Tiger Mountain is a mountain in the U.S. state of Washington.