Unidentified lake shore bird

I have been kayaking on Marranacook Lake in Readfield,Maine. On my last few trips I have seen Ospreys nesting, Loons and young, kingfishers, and Bald Eagles. My problem is a shore bird. If I was on the coast, alot of ideas come to mind. But on a mainelake shore, this is new to me. Short beak, white belly, maybe an eye line. I have never encountered a sandpiper like bird on a lake. Any ideas or experiences. Thanks.

Without a pic, it would be impossible to say. I live near a lake in central Oklahoma, and there are shore birds, wading birds, gulls, terns, pelicans, Ospreys and I don't know what all.  I have mentioned my sighting of an Albatross near Pueblo, Colo.  Anymore, no sightings of anything, anywhere, surprise me.

I understand, I am an experienced birder, just had a bad view. It was the size of a small peep or sandpiper.

A few small sandpipers come to mind that are commonly seen on muddy shores of ponds, lakes, water treatment plants, etc. - especially during migration. Semipalmated Sandpiper & Least Sandpiper are small birds w/ shorter bills. A little bit larger bird commonly found around fresh water is the Spotted Sandpiper. In migration one might also expect to see Western Sandpipers. These are probably the most common (at least in my area). Perhaps there are some others that our members can list. I've seen many Spotted Sandpipers working the edges of rivers, lakes & sewage ponds w/ little or no mud, just sharp dropoffs. The other peeps I mentioned prefer muddy flats & shallow edges to the water features.

A good field guide (like Sibley's complete guide) should let you know more about habitat & probable birds to be found in your area. Let us know if you can ID anything. Welcome to the forum!!

 Time or the year's important. Sandpipers are unpredictable, of course, but, if not in migration, the only sandpiper that fits your discription in range is a Spotted Sandpiper. They got that eye line and are common in lakes (at least in Mexico).

 Actually, spotted sandpipers will have white bellies during the non-breeding season and as juveniles. This sounds a lot like a spotted to me too, but as it was said before, this time of year there are a number of sandpipers which could be seen on a lake. Did you notice its behaviour? Was it constantly bobbing up and down as it moved?

Darker.

It was on the rocks, poking its beak between them as he moved.

 Did he look like this bird?

http://cs.birdersworld.com/brdcs/photos/us_and_canada/picture68394.aspx 

Yes, that looks exactly like my guy! Thanks everyone.