Colo. Rev. Stat. § 33-3-108
If the commission reviews a claim pursuant to the provisions of section 33-3-107, the commission may either confirm a decision of the division denying a claim or may extend to the claimant an offer of settlement. If the claimant disagrees with the commission's determination or refuses to accept the commission's offer of settlement, the claimant may file an action for damages in the district or county court of the judicial district or county in which the damage or any portion thereof is alleged to have occurred. Such action shall be filed within sixty days after the claimant receives notice of denial by the commission, which notice shall set forth the reasons for denial, or within sixty days after the claimant receives an offer of settlement from the commission. If the action is not filed within said sixty-day period, such action shall be forever barred.
C.R.S. § 33-3-108