The only other garter not shown here is T. ordinoides but those are restricted to west of the cascades. You won't find those in Bend. If you're only going to be herping around Bend, then T. s. fitchi is all you can hope to find besides rattlers and you'll only find the garters in wetland habitat so go find a body of water and take a look around. They prefer slow moving water like ponds and sloughs rich with amphibians.