Dogs bark. Plain and simple. If you're outside town then the dogs could be used as watch dogs and it's their job to bark if anyone gets close. If it's really a serious issue to you go check on the dog or dogs. See if they have water. See if they are on a 2 foot rope and are just plain mad and barking. If you see no reason then talk to the owner about your concerns.
Here is what the state has to say:
7-23-2110. Barking dog control
The governing body of a county may, by adoption of an ordinance that substantially complies with 7-5-103 through 7-5-107, regulate barking dogs. An ordinance adopted pursuant to this section may not apply to a dog that is owned, kept, or harbored as part of the business of a licensed veterinarian, animal boarding facility, or agricultural or livestock operation.