4-H at The Larimer County Fair

Visit the Activity Zone, pick up treats at the Dairy Bar, or view the Project Exhibits. 

Learn how to design, build, or demonstrate flying or non-flying model rockets.

A 4-H leader helps a young man set up his model rocket preparing it to launch

4 -H Record Books are also called e-Records. Each project has its own record book that members are required to complete each year. The links to e-Records in the specific project areas are below. Record books are turned in at Interview Judging before our County Fair. In June, you will need to schedule an interview for each of your project areas and bring your record book with you to Interview Judging the week of the Larimer County 4-H Fair.


We have more information about how to fill out your record books here.

2023 - 2024 Record Book (PDF) 

2023 - 2024 Record Book (DOCX)

Project units 1 & 2 are designed for all members who what to learn more about model rocketry.

Unit 1 & 2 - Introduction to Rocketry

Inspiring youth to:

  • Learn how a model rocket works
  • Learn design features of a model rocket and tools and techniques needed for building model rockets
  • Understand safe engine installation
  • Have necessary equipment and procedures for a safe launch
  • Build two rockets using skills learned
  • Learn types of rockets
  • Understanding Model Rockets Safety Code
  • Learn basic parts of a rocket
  • Learn the launching and recovery parts of a rocket
  • Tools and special equipment for building and launching a rocket

Project unit 3 is designed for all members and uses and builds upon skills learned in units 1 & 2.

Unit 3 - Intermediate Model Rocketry

Inspiring youth to:

  • Learn multi-staging launch systems
  • Learn rear and front engine boost gliders

Project units 4 & 6 is designed for all members and uses advanced rocketry skills.

Unit 4 - Advanced Model Rocketry

Inspiring youth to:

  • Learn how to organize a model rocket club
  • Learn engine types, classifications, and performance
  • Learn how to fit a parachute
  • Learn the art of payload launch
  • Learn about rocket stability
  • Learn how to build a wind tunnel
  • Take aerial photographs
  • Understand why you need cluster rockets

Larimer County Workshops:

We have some great workshops coming up for our Model Rocketry members to develop and practice their skills! 

Those who register will be emailed workshop details in advance of each workshop.

If you have questions about the project, please feel free to contact your Key Leader, Ryan Gebhardt (ryan.duke@gmail.com).

Build & Fly Workshop

April 17th, 2022
9am – 3pm
Berthoud Room, McKee 4-H Building

Sign-up Here

Open Launch Workshop

May 14th, 2022
9am – 12pm
Grassy Field near parking lot AA, The Ranch

Sign-up Here

Practice Fly Day

Final practice before July 30th Fly Day Contest at County Fair
June 11th
9am – 12pm
Grassy Field near parking lot AA, The Ranch

Sign-up Here

Model Rocketry Launch Day Extravaganza

Join us for a fun filled day of model rocketry!

View a pdf of the flyer here (link opens in a new tab)

  • Bring your model rocket to launch it before fair
  • Ask questions about ways to improve your rocket before fair
  • Get help with the project record book
  • If you do not have a model rocket, no worries! Come launch a pre-built rocket!

When: July 9th at 7:00 A.M.
Where: Arapahoe County Fairgrounds Rodeo Arena

Register here by July 1st (link opens in a new tab)

Maximum of 100 participants

If you have questions, contact:

Thinking about signing up for the Model Rocketry Project? Already enrolled but have questions? Contact us.

Larimer County Colorado State University Extension

Send email

1525 Blue Spruce Dr.
Fort Collins, CO 80524-2004

Phone: (970) 498-6000 

7:30 a.m. - 4:30 p.m.
Monday - Friday 

Sign up for our e-newsletter. 

Our office follows the Larimer County Holiday Calendar for office closures.