Precinct caucus attendees must be registered to vote and affiliated with the Republican Party by 4 January and must be a resident of their precinct by 1 February to be eligible to participate in their precinct caucus.

Tuesday 1 March 2016 (presumably): Precinct Caucuses meet in each precinct at 7p MST to choose delegates to the County Assemblies and District Conventions. Caucuses last about 1.5 hours. There are 2,917 precincts.

• There is no formal system applied in the Precinct Caucus to relate the presidential preference of the participants to the choice of the precinct's delegates to the Colorado County Assemblies and District Conventions; (NOTE: It is the District Conventions and the State Convention that will actually elect Republican National Convention delegates to presidential contenders).

Tuesday 1 March - Saturday 26 March 2016 (presumably): County Assemblies. County Assemblies elect delegates to the Congressional District and State Conventions.

Distict Caucuses choose the 6 National Convention Delegates (3 in each of Colorado's District) along with the district's delegates to the Colorado State Republican Convention.

• National Convention Delegates are bound according to the Presidential candidate (or uncommitted) indicated on their intent to run form.

Source https://twitter.com/cologop and http://blogs.denverpost.com/thespot/2016/04/02/ted-cruz-wins-colorado-delegates-donald-trump/125427/:

2 April 2016: Ernest Lee Luning @eluning All 3 are @tedcruz #RNC2016 delegates from @cologop CD1 ... [the delegates are former Secretary of State Scott Gessler, state Representative Justin Everett and former state Senate candidate Tony Sanchez ... the alternates are Carolyn Olson and Bill Eigles, Cruz campaign delegates ... the final alternate is Ray Garcia, a Cruz supporter and state House candidate.]

2 April 2016: Ernest Lee Luning @eluning ... @tedcruz sweeps in CO CD6, now has all 6 of CO's #RNC2016 delegates allocated so far (37 total incl 3 @cologop) [the delegates are John Carson, Randy Corporon and Regina Thomson ... the alternates (in order) are Arapahoe County GOP Chairwoman Joy Hoffman, an uncommitted party leader; Andy Jones, a pledged Cruz delegate ... and Brian Arnold, who is unpledged.]

Distict Caucuses choose the 6 National Convention Delegates (3 in each of Colorado's District) along with the district's delegates to the Colorado State Republican Convention.

• National Convention Delegates are bound according to the Presidential candidate (or uncommitted) indicated on their intent to run form.

8 April 2016. Source: Ted Cruz bolsters Colorado lead at 7th CD convention in Arvada from The Denver Post.

"Ted Cruz ... winning 3 more national delegates Thursday ... of the 3 alternates selected, 2 are committed Cruz supporters and 1 ... unpledged ... [Libby] Szabo, Anil Mathai and George Athanasopoulos are the 3 delegates. The 3 alternates ... are Dan Green, Ytterberg and Carter Mateer".

Friday 8 April 2016 (presumably): Colorado's District Conventions for CDs 2, 3, 4, and 5 in Colorado Springs. Delegate Selection: Delegate Selection Caucus/Convention. Voter Eligibility: Closed Caucus/Convention.

Distict Caucuses choose the 15 National Convention Delegates (3 in each of Colorado's Congression Districts) along with the district's delegates to the Colorado State Republican Convention.

• National Convention Delegates are bound according to the Presidential candidate (or uncommitted) indicated on their intent to run form.

Source: Ted Cruz Wins Majority of Delegates in Colorado from The New York Times. "Mr. Cruz had taken 21 of the state's 37 national delegates". Ted Cruz adds 21 delegates with Colorado sweep from The San Luis Obispo Tribune. Due to these reports, we are soft counting the 4 unpledged delegates for Cruz.

Caucus
Source: Colorado Republican Party.
Status: Official. Retrieved: Tuesday 12 April 2016.

Saturday 9 April 2016 (presumably): The Colorado State Republican Convention convenes. The State Convention chooses 13 of 37 delegates from Colorado to the Republican National Convention. Delegate Selection: Delegate Selection Caucus/Convention. Voter Eligibility: Closed Caucus/Convention.

• National Convention Delegates are bound according to the Presidential candidate (or uncommitted) indicated on their intent to run form.

In addition, 3 party leaders, the National Committeeman, the National Committeewoman, and the chairman of the Colorado's Republican Party, will attend the convention by virtue of their position, bound to the candidate of choice.

Ted Cruz dominates Colorado GOP convention winning all 34 delegates from The Denver Post. "Cruz completed the sweep by winning all 13 delegates at the state convention in Colorado Springs."

State Convention
Source: Colorado Republican Party.
Status: Official. Retrieved: Tuesday 12 April 2016.

Candidates for national convention delegate need not identify the presidential candidate they are pledged to support, but may do so at their option. The ballot shall include the presidential candidate each candidate for national delegate is pledged to support, or shall indicate that the candidate for national delegate is unpledged. CRC Bylaws, Art. XIII, § A(5)(c).

In the event a candidate for national delegate indicates on his or her notice of intent to run as a national delegate that such candidate is pledged to support a particular presidential candidate, the State Chairman of the Colorado Republican State Central Committee shall cast the vote on behalf of that national delegate on the first nominating ballot in accordance with the pledge of support made by such national delegate on their notice of intent to run; except that if a qualifying presidential candidate releases his delegates through public declaration or written notification, the presidential candidate's name is not placed in nomination, or the presidential candidate does not otherwise qualify for nomination ..., the individual National Delegates and National Alternate Delegates previously pledged are released to cast their ballots as each may choose, or the State Chairman shall allocate and cast the delegate votes to the remaining presidential candidates as if the eliminated presidential candidate had failed to qualify. On any succeeding ballot for president, the national delegates are released to cast their ballots as each may choose. CRC Bylaws, Art. XIII, § A(3).

SB 15-287, introduced on 29 April 2015, would establish a Presidential primary on a date selected by the Govornor. The date must not be earlier than the major political parties allow without penalty and not later than the 3rd Tuesday in March. This bill died in committee circa 5 May 2015.

21 August 2015: The Republican Executive Committee votes to cancel the traditional Presidential preference Poll at the Precinct Caucuses. National Convention delegates will not be bound to any candidate.

Colorado’s delegates to the 2016 RNC will be unbound.

August 25, 2015

GREENWOOD VILLAGE, Colo.—Last Friday, members of the Colorado Republican Committee’s Executive Committee decided against holding a straw poll at its 2016 caucus. The decision means Colorado’s delegates to the 2016 Republican National Convention will be unbound.

Republican National Committee bylaws do not allow states to hold non-binding preference polls. Any straw poll conducted at the caucus in 2016 would bind delegates to the poll’s results, even if a candidate ultimately decides to suspend or withdraw their campaign.

“Eliminating the straw poll means the delegates we send to the national convention in Cleveland will be free to choose the candidate they feel can best put America back on a path to prosperity and security,” Chairman Steve House said. “No one wants to see their vote cast for an empty chair, especially not on a stage as big as the national convention’s.”

The date of the 2016 Colorado Republican Caucus will be announced next month. Colorado law, however, requires scheduling the caucus on the first Tuesday of either February or March 2016.

22 September 2015: Inside the RNC’s Fight to Bind Colorado Delegates from http://politichicks.com.