The Dayton area doesn't have mountain bike trails but they have a very nice rail-to-trail system that is paved. Check out
www.activedayton.com you have to register for the site but it's free and has all kinds of information about the area including recreation. I did a quick search and came up with these companies for bike rentals
http://oh.allpages.com/dayton/shopp...ng/athletic-equipment-rental/bicycle-rentals/ you can rent canoes/kayaks from some of these companies.
http://phonebook.superpages.com/yellowpages/C-Canoe+&+Kayak+Rental+&+Leasing/S-OH/T-Dayton/ The zip codes closest to the Dayton airport are anything starting with 454 or 453, Springfield isn't too far and it's prefix is 455. Zip codes starting with 450, 451 or 452 are in Cincinnati and the surrounding area. Columbus has 430, 431 and 432 prefixes.
Five Rivers Metro Parks is the recreation division in Dayton, we have more rivers than lakes but Caesar's Creek Lake and several reservoirs are close to Dayton.
Gilboa is only about an hour and 45 minutes from the Dayton airport. Most of the other dive sites are within 2 hours of Dayton, we're really pretty centrally located when it comes to Ohio/Indiana/Kentucky diving. If you are staying at a hotel and want lots of restaurants nearby try to get one on Miller Ln. that's "restaurant row" for the north side of Dayton and it's right along I-75. There is a nice KOA in Brookville, Ohio which is about 10 miles from the airport and it is easy to find from westbound I-70. I can't tell you much about the south side of town, I rarely go there. The south end is where most of the hotels and restaurants and malls are though. Other options for nearby (to the airport and Dayton) hotels include Huber Heights, Vandalia and Englewood. A little farther north (10-15 miles) you have Tipp City and Troy.
The only place you really don't want to be is on the west side of Dayton, once you cross over the "Peace Bridge" downtown the peace stops
Hope this helps!
Ber :lilbunny: