Logan County is in the Till Plains ecoregion. Created by a dam on the Great Miami River, 5,104 acre Indian Lake is the second largest inland lake in Ohio. Two rivers have their headwaters in the county, but they flow into different Ohio River tributaries. The Mad River is part of the Great Miami River Watershed. Big Darby Creek flows into the Scioto River in Pickaway County.

Places to visit

• Indian Lake State Park Indian Lake is a large lake with many access roads to the various areas. Accessible areas include Orchard Island, Pew Island, Fox Island. 31 species have been observed recently, and historical records for the area include Hine's Emerald and Green-faced Clubtail.

• McCracken Fen State Nature Preserve.  A former peat and marl mine, McCracken Fen has recently had a changing water level which impacts Odonata numbers. There is a mowed parking area and walking trails. Direct access to water areas is limited. No restrooms. Notable amongst the 37 observed species are Elegant Spreadwing and Lilypad Forktail.

• Myeerah Nature Preserve, Myeerah Wetland Myeerah was a girl-scout camp, now a public park. Myeerah has several ponds, MacDonnal Lake, and a constructed wetland preserve. There multiple parking areas and walking trails. Restrooms available. 37 species have been observed in this area.

• The Great Miami River Water Trail Map provides guidance on river access and facilities.

County Observation Activity

This graph shows the total number of odonata observations for the county in blue, with the average for all Ohio counties in orange. The season is divided into 10 or 11 day segments by Month – basically early-month, mid-month, and late-month.