This Utah flag design was insried by the three other Four Corners states' flags. The orange represents Utah's main color, and Utah's five national parks. The blue river represents the Great Salt Lake, and the rivers in the national parks. The river is also in the shape of a "U", the first letter in "Utah". A yellow outline of Utah is shown on the top of the flag.
The current Utahn flag has the state seal on a field of blue, which makes it very hard to distinguish among a hundred other state flags with bad stuff on blue backgrounds. The other three Four Corners states have great flags, like Colorado, New Mexico, and Arizona, but Utah's flag is one of the worst I've ever seen.