Police Chief Robert White says two officers were on bicycle patrol near the state Capitol building Wednesday night when a person who saw the robbery called them over to the store.
The primary backers of the measure disputed the claim and accused the group of using scare tactics.
The fire in central Colorado had burned only about 100 acres but was dangerously close to two densely populated housing developments near the town of Silverthorne, about 60 miles (97 kilometers) west of Denver.
It's the first full closure of a national forest in Colorado since 2002.
The legislation would ensure states have the right to determine the best approach to marijuana within their borders.
Colorado voters will choose would-be successors to Democratic Gov. John Hickenlooper, who is limited after two terms, in the June 26 primary election.
The most public split comes in Colorado, where two Democrats with deep roots in education policy have come under attack by the state's biggest teachers union on behalf of the state's former treasurer, Cary Kennedy.
U.S. Supreme Court sides with Colorado baker on same-sex wedding cake, but big issue remains unresolved
The court is not deciding the big issue in the case, whether a business can invoke religious objections to refuse service to gay and lesbian people.