# Jeffco Mineral Show

> Event for families in the Denver–Aurora–Centennial area (CO). Times are Mountain Time.

- When: Fri, Nov 20 (+2 more dates) · 10:00 AM
- Where: Exhibit Halls at Jeffco Fairgrounds, 15200 West 6th Avenue, Golden, CO 80401
- Ages: Everyone is welcome
- Price: FREE ADMISSION
- Organizer: Jeffco Mineral Show
- Official page: https://www.visitgolden.com/event/jeffco-mineral-show/
- Last checked: Sat, Oct 24

Source: Grassy Knees is a directory of real family events, places and programs for kids across major U.S. metro areas, where every listing is researched from the organizer’s own page and shows the date we last checked it. https://grassyknees.com covers 32 metro areas as of Oct 24, 2026, with more added regularly. About: https://grassyknees.com/about
Freshness: listings are re-checked on a daily research run (latest check 2026-10-24), and new events are added as organizers post them. Sell-outs, weather cancellations and time changes show up on the live page first: https://grassyknees.com/denver/activities/jeffco-mineral-show--listing-1cb2ad2d6eb12d65109195f3

## About

The annual Jeffco Mineral Show fills the exhibit halls at the Jefferson County Fairgrounds for three days with more than 20 vendors selling minerals, fossils, gemstones and crystals. Admission is free and the organizers pitch it to rock-loving kids as much as collectors: families can browse specimens, ask vendors where pieces come from, and crack open a geode to see what is hidden inside. It is an easy one- to two-hour outing for school-age rock hounds; bring a little spending money if your child will want to take home a geode or fossil.

## Similar picks in Denver

- [Discovery Play (Belmar)](https://grassyknees.com/denver/activities/discovery-play-belmar--listing-58e05e9e2150cea970d44338) — Fri, Nov 20 (+1 more date) · 2:00 PM – 3:00 PM · Jefferson County Public Library – Belmar Library, Lakewood · Ages 0–5 · Free · checked Oct 23. Let's play! Build STEAM (Science, Technology, Engineering, Art, and Math) skills as you enjoy hands-on fun in this drop-in and self-paced program with your young child.
- [2026 Denver Mayor's Office Diwali Celebration (Central Library)](https://grassyknees.com/denver/activities/2026-denver-mayor-s-office-diwali-celebration-central-library--listing-a1d9c63bae8bb86b89b32d57) — Fri, Nov 20 · 6:00 PM – 8:00 PM · Denver Public Library – Central Library · All ages · Free · checked Oct 23. Join us for an evening of food, dance and celebration of the Festival of Lights. Date: Friday, November 20, 2026 Location : Denver Central Library - Park View Room 10 W 14th Ave…
- [Teens Game ON: D&D Club (Green Valley Ranch)](https://grassyknees.com/denver/activities/teens-game-on-d-and-d-club-green-valley-ranch--listing-06891c59932d38ff77d2a2b0) — Wed, Nov 18 (+1 more date) · 3:30 PM – 5:00 PM · Denver Public Library – Green Valley Ranch Branch Library · Ages 13–18 · Free · checked Oct 23. Join us in the Community Room every month on the 3rd Wednesday for our ongoing teen Dungeons & Dragons campaign! All skill levels are welcome. Whether you are brand new or a…
- [Midweek Mindful Space for Teens: Perler Beads (Conifer)](https://grassyknees.com/denver/activities/midweek-mindful-space-for-teens-perler-beads-conifer--listing-e28509cd378efe17feffd1bf) — Wed, Nov 18 · 4:00 PM – 5:00 PM · Jefferson County Public Library – Conifer Library · Ages 12–18 · Free · checked Oct 23. Take a break in the middle of your week with a welcoming, low-pressure space designed just for teens in grades 6 – 12. This monthly after-school hangout at the library is all…
- [Blossoms of Light](https://grassyknees.com/denver/activities/blossoms-of-light--listing-755fa984dc385e7e57664524) — Nov 20 – Jan 11 · 11:30 PM – 4:00 AM · Official event venue · checked Oct 16. Consistently lauded as one of the top holiday light shows in the nation, Blossoms of Light® is a spectacular celebration that illuminates our York Street location. This dazzling…
- [SCFD Free Day at Dinosaur Ridge: Colorado's Sesquicentennial](https://grassyknees.com/denver/activities/scfd-free-day-at-dinosaur-ridge-colorado-s-sesquicentennial--listing-3782adf4edd496884182b04f) — Sun, Nov 15 (+1 more date) · 9:00 AM – 4:00 PM · Dinosaur Ridge Main Visitor Center, Morrison · All ages · Free · checked Oct 14. SCFD Free Days celebrating Colorado's 150th anniversary: free entry to the main visitor center Exhibit Hall and the Deep Time Detour Exhibition at the Martin G. Lockley Discovery…

## More for families

- [This weekend in Denver](https://grassyknees.com/denver/this-weekend) (Markdown: https://grassyknees.com/denver/this-weekend.md)
- [Things to do with kids in Denver](https://grassyknees.com/denver) (Markdown: https://grassyknees.com/denver.md)