The third annual Rocky Mountain RepRap Festival brought 3D-printing makers, projects and demonstrations to Loveland, Colorado, in May 2025. Highlights included unusual printer builds, creator interviews, a belt-driven printer and hands-on demonstrations. The dates and crowd size differ between the organizer’s event page and Make:’s recap, so both estimates are attributed below.
What was Rocky Mountain RepRap Festival 2025?
RMRRF was a community-centered gathering focused on 3D printing and maker projects, rather than simply a conventional trade show. It took place at the Pedersen Toyota Center at The Ranch Events Complex in Loveland, Colorado. The organizer’s 2025 event page lists May 18–19; Make:’s May 20 recap says the festival ran May 17–18. The available accounts do not resolve that one-day discrepancy.
How large was the festival?
The available figures are estimates, not an audited attendance count, and their categories are not identical.
- Organizer estimate: The festival’s official page reports approximately 5,800 people over two days, explicitly counting general attendance, makers, exhibitors, sponsors and event staff.
- Make: estimate: Joan Horvath and Rich Cameron estimated about 3,600 people on day one and 1,700 on day two, plus about 500 exhibitors, for roughly 6,000 total. These are the authors’ estimates, not a verified count.
Because the organizer’s total explicitly includes several participant and staff categories, it should not be read as a clean attendee-only figure or directly equated with Make:’s day-by-day estimates.
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Projects and demonstrations that stood out
A video description by creator The Real Sam Prentice lists interviews and demonstrations involving a range of machines, builds and makers. The examples below are selected highlights from that video, not a complete official program.
- DiamondBack and a Deathracer were among the named projects or features.
- Printcepts’ Baby Belt offered a belt-driven printer example.
- KitKiln designs and Zombie Makes were also featured.
- 3D Gloop’s tugging machine appeared among the demonstrations.
These examples show the event’s mix of machines, designs and hands-on maker activity without implying that they were the only projects on display. The creator’s video is titled “Is This the Best 3D Printing Event Ever? RMRRF 2025”.
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Filament and exhibitor activity
Filament was one tangible product category represented at the festival. In its retrospective, exhibitor Overture says it brought Easy PLA, Matte PLA and other PLA colors to its booth. That report documents what Overture showcased; it does not establish a festival endorsement, award or recommendation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Talks and community coverage
The official event page points to Maker Lounge talks and community and creator videos. The surfaced page text does not identify every talk or speaker, so a complete 2025 speaker list cannot be established from it. The creator video and exhibitor retrospective provide additional views of particular projects and booth activity, rather than a full event program.
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- Up to 16 Colors: Bring your designs to life with vibrant multi-color/multi-material printing capabilities, perfect for showcasing your creativity. Note: Connecting Bambu Lab AMS is required.
- 500mm/s and 20000 mm/s² Acceleration True High Speed: Don't wait around for your masterpieces. Lightning-fast printing speed lets you focus on creating, not waiting.
- Enclosed Design: Fully enclosed body improves print performance for advanced filaments. Automatic Bed Leveling: Say hello to high-quality, successful prints. Auto bed leveling makes 3D printing such an easy thing.
- Set Up in 15 Minutes: Spend more time printing and less time setting up. User-friendly design ensures a hassle-free assembly experience for all skill levels.
- Supported Filament: Ideal: PLA, PETG, TPU, PVA, PET ABS, ASA; Capable : PA, PC; Not Recommended: Carbon/Glass Fiber Reinforced Polymer.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
