The final mile has fewer spectators because most people enjoyed the starting line more.

Starting is social and energizing and attracts company. The final stretch is solitary, detailed, and offers nothing except the finish, which is exactly why most people are no longer around for it. That thinning is not a sign you are doing something wrong.

Expect the last part to be lonely and plan for it. Arrange your own accountability, since the enthusiasm that surrounded the beginning will not be there to carry you through the end.