After researching the Clark Road Extension 303 boat ramp in Sturbridge, Massachusetts, it appears that there is limited information available on its specifications. However, according to the Town of Sturbridge's website, the town does have a boat ramp located on Clark Road Extension that provides access to Cedar Pond. It is unclear if this is the same boat ramp identified in the coordinates provided.

Assuming it is the same boat ramp, it is likely that it provides access to Cedar Pond, which is a 100-acre pond located in Sturbridge. Based on the limited information available, it is unclear what kind of watercraft are permitted on the pond or what the width of the boat ramp is. However, it is important to note that the Massachusetts Division of Fisheries and Wildlife does regulate boating and fishing activities on Cedar Pond, and it is recommended that anyone planning to use the boat ramp consult the official regulations to ensure compliance.