Police are investigating the death of a woman whose body was found along a walking path on Cape Cod, although foul play is not suspected, Harwich police spokesman Aram Goshgarian said. Family members reported the 42-year-old Harwich woman missing Wednesday afternoon after she went for a walk Tuesday morning at 7 a.m. and never returned home, Goshgarian said. A police dog located her body about 4:30 p.m. Wednesday near a semiwooded walking path near Flax Pond. Goshgarian said nothing about the scene was “obviously suspicious’’ that could lead investigators to think foul play was involved. Police are unsure how long the woman’s body had been there.