In the autumn more than 450 flint fragments were discovered, some of which are tools about 7,000 years old. Many are burnt, indicating the presence of camp fires or hearths.
Archaeologists say it is very rare to find evidence of Mesolithic people and this discovery is the culmination of a major project that has been searching for traces of them in north east Yorkshire.
A spokesman for the project said: “Archaeological remains are rare from the Mesolithic period.
Story: Yorkshire Post | Photo: Jon Prudhoe, West Yorkshire Archaeology Service