Important Bird Area.
Trueblood is a 150+ acre park in S Iowa City, between Gilbert St / Sand Rd and the Iowa River. It is just S of McCollister Blvd. It contains Sand Lake , a 95 acre former sand and gravel quarry. In season it is good for waterfowl, and the area between the river and lake is good for Eur. Tree Sparrows. Formerly it was known as Sand Lake, Sand Lake Park, the S&G Quarry.