Canon EOS Digital Rebel XTi w/ Sigma 17-70mm f/2.8-4.5 EX DG lens @ f/7.1, 3.2 sec., ISO 100 There is an apartment building nearby and I am not sure if the area is public or private... I suspect it's public since there is no fence or gate, and the Poughkeepsie website describes an ambitious public waterfront project. Either way, nobody tried to kick me out.
The Mid-Hudson Bridge Walkway The M.H.B. has a pedestrian walkway/bicycle lane which you can use to get some close-ups from on the bridge itself.
The M.H.B. from Walkway Over the Hudson The old Poughkeepsie railroad bridge was recently converted into the Walkway Over the Hudson. This location gives you an extremely high vantage point on the Mid-Hudson Bridge as well as the river and surrounding areas. You can enter on the Poughkeepsie side from Parker Ave. off Washington Street. Street parking as well as a parking lot at 61 Parker Ave. is available.
Canon EOS 5D w/ 24-70 f/2.8L lens @ f/13, 1/320 sec., ISO 200 Be careful that your camera is secure up here because there's no way it will survive a fall over the side. And a note for those who are afraid of heights: the Walkway Over the Hudson is high. Very high. Very, very high. If you want close-up shots of the bridge from the Walkway you will need a very telephoto lens. There's a lot of distance between the two structures.
The Mid-Hudson Bridge from Locust Grove The Locust Grove Samuel Morse Historic Site is an attraction all its own, with the added benefit of having a distant view of the Mid-Hudson Bridge. One could spend all day hiking around the three miles of trails on these grounds. As you can see from the trail map, some of them lead down to the Hudson River. Find the right spot up high enough with a clearing in the trees, and you can see the Mid-Hudson Bridge off in the distance.
Canon EOS 5D w/ EF 24-70 f/2.8L @ 70mm, f/10, 1/200 sec., ISO 200 A very telephoto lens from this location could give you an interesting perspective of the bridge against the foliage on the west side of the river.