Let’s kick off the new school year together with a warm, wonderful day at the beautiful Niwot Children's Park! Join us August 15th from 9:00 AM - 11:00 AM to soak up the last of the summer sun and celebrate the start of another amazing year at MSIMS.

Whether you are a returning family excited to catch up with old friends, or a new family ready to make your first connections in our community, this is the perfect chance to celebrate the year ahead. Pack your favorite picnic blanket, bring along some delicious snacks, and let the kids burn off that end-of-summer energy on the playground while we all enjoy the fresh air.

Location: Niwot Children's Park (101 1st Ave, Niwot, CO)

Join our students on Friday, September 18th, at 2:00 p.m. in honoring a core Montessori value as we come together to celebrate peace.

Embrace the autumn spirit with us at our annual Fall Fest on Saturday, October 24th, between 9:00 a.m. and 12:00 p.m., featuring joyful seasonal activities for all ages.

Location TBA.

Get ready for a spooktacular afternoon on Friday, October 30th, starting at 2:00 p.m!

Watch our students show off their creative costumes in a delightful school-wide parade, bring your favorite creepy treats, and enjoy some ghostly fun at our community Monster Mash!

Celebrate the joy, potential, and rights of children everywhere with this special tentative event dedicated to our youngest global citizens on Thursday, November 19th, at 2:00 p.m.

On Friday, November 20th, during student lunch times, we warmly invite grandparents and special family friends to share a wonderful mealtime experience with their students.

In this fun workshop led by our Primary staff, children will explore simple decorating techniques to create festive cookie creations with colorful icing, fun toppings, and plenty of imagination. Along the way, they will explore colors, patterns, textures, and creative expression in a playful and supportive environment guided by the nurturing adults they know and love.

This experience is designed to create cozy holiday memories and joyful moments for everybody— we haven't left out the grown-ups! While the little ones decorate their treats we will be putting the finishing touches on our van for the Lights of December parade as a community. 

Expect iconic wintry tunes, nostalgic fun, laughter with friends, and adorable photo opportunities that families will treasure long after the cookies are gone.

Note: Registration is open only to Primary students.

Sign-Up: $35

Date: December 12, 2026

Time: 9:00–11:00 AM

Ages: 3–6

Registration coming soon! 

Bundle up and join our school community in downtown Boulder on Saturday, December 12th, at 6:00 p.m. to celebrate the magic of the season with sparkling floats and holiday cheer.

Ring in the winter season on Friday, December 18th, with a beautiful musical performance by our students before we head off for winter break. To make the show even sweeter, we’ll be hosting our annual cookie exchange!

Let's celebrate our beautiful planet on Thursday, April 22nd, at 2:00 p.m. Join the entire school for this annual event as we honor environmental stewardship and our connection to nature.

Bring a blanket and your favorite picnic snacks on Friday, May 14th, as we celebrate the diverse and wonderful families that make our school community so special!