Liz T.
Yelp
Harriman is a fantastic park, especially considering its proximity to NYC and the sheer volume of guests who visit every year.
The 2nd largest park in NYS, Harriman offers lake swimming beaches, lake and stream fishing, hiking, biking, horseback riding, cross-country skiing, camping (designated sites), group camping, trails to numerous historical sites/attractions, and 46k+ acres of nature to explore.
All this the park offers a little to no cost for those who utilize it.
For all of its detractors, Harriman has so much going for it, it's hard not to love it.
As a general rule, park trails are spotlessly clean. The popular trails are very heavily trafficked, and the unpopular trails are virtually deserted--but still well-maintained and clear of human debris.
Unfortunately, off the trails is another story. In recent years I have found extensive dumping and post-party pollution (bottles, cans, etc) areas where there aren't official trails, but there are convenient turn-offs from the road. The over-taxed rangers have only one solution: to ticket any car not on an official trail head. This is unfortunate, as it renders much of the park completely inaccessible. But when people can't be trusted . . .
As for non-hiking activities, the beaches are clean, considering the volume of guests. The cabins are in mixed repair. The campsites are a little close together for my taste, but from my brother's boyscout trips to the group campsites, I understand they have a lot to offer.
However, much of what Joey P. said is true. The parks system (currently grossly under-budgeted), lacks the funds to provide the proper maintenance. As a result, trails are poorly marked, beaches closed, and many of the structures are in need of repair. While I don't think anything is terrible yet, a crisis is definitely on the horizon.
Without proper maintenance, infrastructure will very quickly get to the point where it can no longer be repaired, and needs to be replaced or rebuilt. Unless the economy turns around, we are likely to see more closures, fewer services and amenities, and a general decline of the park.
Harriman is one of the most popular (and therefor top-priority) parks in NYS, a state which generally has one of the best budgets for environmental conservation; it makes one very concerned for the rest of the nation's state and national parks system.