On Monday, April 20, Waltham has two reasons to step outside. Marathon Monday lands on 420 in Waltham this year, layering the energy of Patriots’ Day across the Greater Boston area with one of cannabis culture’s biggest annual celebrations.
Whether you’re a longtime cannabis enthusiast, a curious first-timer, or someone making a day of Marathon Monday and looking to learn more about responsible cannabis use, Uma Flowers dispensary is Waltham’s home base for the occasion.
How to Find the Best 420 Weed Deals in Waltham and 420 Online Deals Near Newton
We’re gearing up for an epic 4/20 celebration. Check out our full lineup of deals you can take advantage throughout the weekend!
Marathon Monday Meets 4/20: A One-Day Overlap Worth Planning Around
The Boston Marathon is one of the most storied athletic events in the country. On April 20, 2026, it also happens to fall on 4/20.
The race covers 26.2 miles, beginning in Hopkinton and finishing on Boylston Street in Boston. Along the way, runners pass through Ashland, Framingham, Natick, Wellesley, Newton, Brookline, and Boston.
The stretch through Newton is particularly significant: around mile 16, runners begin the Newton Hills, one of the most demanding sections of the course. Mile 17 in Newton is a notable spectator location, with support stations on-course and crowds gathering to watch runners push toward the infamous Heartbreak Hill.
Uma Flowers is 11 minutes away from the mile-17 marker in Newton, making it a practical stop before or after you watch the race. Spend the morning cheering runners along Commonwealth Avenue in Newton, then head to Uma for a knowledgeable, low-key cannabis retail experience on your way home.
What Is 4/20? The Origin and Meaning Behind the Holiday
If you’re new to cannabis or just curious about why April 20 carries the cultural weight that it does, the story starts in 1971 in San Rafael, California. Five high school students who called themselves the “Waldos” had a standing agreement: meet at 4:20 p.m. near a statue of Louis Pasteur on their school campus and then head out to search for a rumored abandoned cannabis crop.
The search never turned up the crop, but “420” became the group’s shorthand for cannabis. A private code that spread outward through their social circles, eventually reaching the Grateful Dead community, and later gaining mainstream recognition after a 1990s flyer advertising a 4:20 cannabis gathering circulated at a Dead concert and was published by High Times magazine.
4/20 Deals Near the Boston Marathon: Planning the Full Day
While you’re in the area, Waltham has several stops worth building into the day:
- Moody Street, downtown Waltham: A walkable stretch of independent restaurants, cafes, and shops within a few minutes of the dispensary. Try lunch at one of the local spots before or after your Uma visit.
- Charles River Museum of Industry & Innovation: A restored 19th-century mill building with exhibits on the Industrial Revolution and the watchmaking history that put Waltham on the map.
- Gore Place: A Federal-style historic estate with walking paths and gardens, a calm outdoor option if you want to decompress after a busy morning at the marathon.
- Rose Art Museum at Brandeis University: A free contemporary and modern art museum on the Brandeis campus, open to the public.
- Mighty Squirrel Brewing: A well-regarded local brewery and taproom with craft beer and food, a few minutes from the dispensary.
Visit Uma Flowers This 4/20
Uma Flowers Cannabis Dispensary is located at 196 Bear Hill Road, Waltham, MA 02451. Doors are open to all adults 21 and older with a valid ID.
This April 20, Waltham has the kind of day that doesn’t come around often: a major athletic tradition and a cannabis holiday landing on the same Monday, in a city with a dispensary that was built by locals for locals. Come by before the marathon crowds clear, after you’ve watched the Newton Hills, or anytime during the day. The team at Uma is there to help you make the most of it.
