Utah Code § 75B-2-205: Venue for an action involving a trust.

(1) Notwithstanding Title 78B, Chapter 3a, Venue for Civil Actions, and except as provided in Subsection (2), a person shall bring an action involving a trust in:

(a) the county in which the trust's principal place of administration is or will be located; or

(b) if the trust is created by a will and the estate is not yet closed, the county in which the decedent's estate is being administered.

(2) Notwithstanding Title 78B, Chapter 3a, Venue for Civil Actions, and if a trust has no trustee, a person shall bring an action for the appointment of a trustee in:

(a) a county of this state in which a beneficiary resides;

(b) a county in which any trust property is located; or

(c) if the trust is created by a will, the county in which the decedent's estate was or is being administered.

(3) This section does not apply to an action brought in the Business and Chancery Court.