It is definitely the view that Rattlesnake Guy suggested. It looks to be taken from about the Alton/Wolfeboro town line looking out over the Varneys and Barndoor with Rattlesnake in the distance. We live near there and are familiar with that area of the lake. Here is a link to another postcard in photopost called "Winnipesaukee Islands" that appears to have been taken from about the same place. Based on some correspondence I had with Rattlesnake Gal, she guessed it was from about 1906-1910 based on the description of the postage required.
http://www.winnipesaukee.com/photopo...php?photo=2136