Deer Lakes Park is a 1,180-acre county park in Allegheny County, Pennsylvania in the United States. It is a part of the county's 12,000-acre network of nine distinct parks. The park is sited 15 miles northeast of downtown Pittsburgh in Frazer and West Deer townships. Deer Lakes already had a large man-made lake, and during its development two …Deer Lakes Park is a 1,180-acre county park in Allegheny County, Pennsylvania in the United States. It is a part of the county's 12,000-acre network of nine distinct parks. The park is sited 15 miles northeast of downtown Pittsburgh in Frazer and West Deer townships. Deer Lakes already had a large man-made lake, and during its development two other lakes were added. The lakes are spring fed, and construction of dams and settling basins create a park ideal for fishing. An 18-hole disc golf course with skill-respective tees is featured in the park, and is one of the highest-rated courses in the United States.