"On Saturday, April 14, both parties are holding their state assemblies.
Those are gatherings of state delegates who will vote for Democratic and Republican candidates seeking to get on the ballot through the grassroots caucus-and-assembly process. Those who go through the assembly need 30 percent of the vote from the roughly 4,000 delegates who attend. If a candidate gets fewer than 30 percent but is on the ballot via petition, that candidate can still stay on the ballot. Any candidate who gets fewer than 10 percent of the vote cannot be on the ballot." -The Colorado Independent
Attend the Colorado Republican State Assembly and ask your delegates for their support and to sign a petition! This is an important event for signature gathering - delegates from all over the state will be in attendance! Delegates are allowed to carry a petition only if they are gathering signatures outside the building, so it's important that non-delegates are in attendance gathering signatures as well.
You can find more information about the assembly on the Colorado Republican party website.