← All communities
Reddit community

r/boulder

154.9K members. The best post we have captured here reached 6.4K upvotes, which works out to 41 per 1,000 members.

41peak upvotes per 1,000 members
154.9Kmembers
6.4Kbest post
1Kmost comments
481posts we track

Open r/boulder on Reddit ↗

What actually lands here

The mix of post types among everything we have captured. Posting a link where almost nothing but images lands is wasted effort, and this is the fastest way to see it.

32% 25% 18% 10% 8%
Text 32% Image 25% Question 18% Gallery 10% Video 8% Link 7%

The topics it labels

Flairs are the community's own categories, and the closest thing a subreddit has to telling you what it wants.

Fat Bear Week 3 Update: Found! 2 Meta 2 Starlink 1 Locked 1 Found! 1 Sept 27 1 controlled burn 1 active traffic incident 1 Update: Found... 1

What the ceiling looks like

The biggest posts we have captured here. Links go to the original on Reddit.

Solid turnout at NOAA Boulder today to protest the firing of employees by the current administration.

↑ 6.4K 💬 165 gallery 2025

Upsidedown Flag on the 2nd Flatiron

↑ 6.4K 💬 173 video 2025

‘No Way To Prevent This,’ Says Only Nation Where This Regularly Happens

↑ 5.7K 💬 1K link 2021

Visibility brigade tonight in Louisville

↑ 5.2K 💬 114 image 2026

No fascist USA

↑ 4.8K 💬 351 video 2025

4 new fires in 3 days and this man is the only lead anyone has. Tattoo on right inner forearm. SHARE EVERYWHERE!

↑ 4.2K 💬 315 image 2024

What a prick

↑ 3.8K 💬 356 image 2024

Spotted next to North Boulder Park

↑ 3.8K 💬 199 image 2025

Here’s a kind of memorial I just finished balancing for the 10 “boulderites” who died on Monday.. ❤️

↑ 2.7K 💬 249 video 2021

Visibility brigade tonight

↑ 2.6K 💬 50 gallery 2026

Communities its size

Within four times the member count either way, so the comparison is fair. Sorted by upside.

r/boulder, in numbers

Answered from the posts ViralHunt holds from this community, not from Reddit's own about page.

How many members does r/boulder have?
r/boulder has about 154.9K members. ViralHunt has tracked 481 of its posts; the biggest reached 6.4K upvotes, which is 41 per 1,000 members.
What is the most viral post on r/boulder?
"Solid turnout at NOAA Boulder today to protest the firing of employees by the current administration." reached 6.4K upvotes and 165 comments in 2025, the highest score among the posts we hold from r/boulder.
What subreddits are similar to r/boulder?
Communities of a comparable size we track: r/Trumpvirus, r/alaska, r/Louisiana, r/popculture, r/Antimoneymemes, r/BlueskySkeets.
What kind of posts do best on r/boulder?
Of the posts we hold, 32% are text posts and 25% are image posts.
When is the best time to post on r/boulder?
Across 481 timestamped posts we hold, the slots whose posts averaged the highest score are Friday at 00:00 UTC (2.1K avg upvotes), Sunday at 14:00 UTC (1.7K avg upvotes), Monday at 21:00 UTC (1.6K avg upvotes). The busiest day is Friday. For Reddit as a whole, see the best time to post on Reddit page.
How many upvotes does a post need to reach the top of r/boulder?
The 20th-best post we hold from r/boulder has 1.7K upvotes, so that is roughly the bar for the top twenty. We captured 230 posts from it in the last 30 days.

See what is climbing here before you write

ViralHunt tracks Reddit and eight other networks, records how every post grows, and puts what is taking off in front of your team in one list.

Start free →

Every figure here is what ViralHunt has captured from r/boulder, not everything the community has ever posted. We deliberately do not publish an average score: our sample is weighted toward a community's best posts, so an average would be flattering and wrong. Peak per 1,000 members is computed the same way for every community listed. See how we measure.