Every tower along South Miami Avenue advertises the same short list: rooftop pool, fitness center, resident lounge, maybe a private theater room if the HOA dues run high enough. Ask a resident what they actually used last Saturday morning, though, and the answer increasingly has nothing to do with their building's amenity deck. It happened under the Metrorail tracks, on a strip of land the county spent over a decade turning into a park.

That strip is Brickell Backyard, the half-mile opening stretch of The Underline, and this year it is running a weekly and monthly schedule that outpaces what most private amenity floors offer. A Saturday market. A free yoga class. A community fitness session. A monthly group run open to anyone who shows up. None of it requires a key fob, and none of it shows up on the glossy building brochures. If you live in Brickell and think of The Underline as the path you cut through to reach the Metromover, you are using about a third of what is already there.

What's actually running under the tracks right now

Brickell Backyard opened to the public on February 26, 2021, connecting the Miami River to SW 13th Street next to the Brickell Metrorail station. It was the first completed segment of a corridor designed by James Corner Field Operations, the same firm behind New York's High Line, and it was built specifically to turn unused land beneath the elevated rail line into something residents would actually use rather than walk past.

The programming has caught up to that ambition. As of this fall, the recurring calendar looks like this:

• A Saturday market beneath The Underline in Brickell, running weekly through October 10, 2026, with fresh produce, prepared food and goods from local vendors.
• A free weekly yoga class at the corridor's Inter Stage, scheduled through December 18, 2027, making it the longest-running fixture on the calendar by a wide margin.
• A free community fitness class pairing strength training with a guided group run, offered on select days through October 18, 2026.
• A monthly inclusive group run, held the third Wednesday of the month through September 16, 2026, open to runners, joggers and walkers who want to move through the neighborhood together rather than alone.

Add the built-in features that don't need a calendar entry at all. The segment includes a basketball and multi-sport flex court, a playground, and paths wide enough for the free bike-share network the county introduced along the corridor in 2025. Waste bag stations and water fountains mean dog walks are part of the daily rhythm here too, not an afterthought.

Stack that against the average Brickell building's amenity offering and the comparison stops being close. A rooftop pool sits empty most weekday mornings. A resident gym runs on nobody's schedule but your own. The strip under the tracks runs on a published calendar, for free, with somebody else covering the cost of showing up.

Why the calendar is getting fuller, not thinner

None of this happened by accident, and none of it is finished. The Underline is being built in three phases, and the reason Brickell's segment has become the most heavily programmed part of the corridor is timing. Phase 2, a 2.14-mile extension linking Brickell to the historic Roads, Shenandoah and Silver Bluff neighborhoods, opened in April 2024. Phase 3, a 7.36-mile stretch running from SW 19th Avenue to the Dadeland South Metrorail station, is scheduled to finish this year.

When that happens, the full corridor becomes a continuous 10-mile, 120-acre linear park stretching from the Miami River to Kendall, the longest built-out segment of what Miami-Dade County calls a "world-class, multimodal urban trail." Brickell Backyard stops being a standalone half-mile amenity and becomes the northern anchor of a system ten times its current length.

Eulois Cleckley, the county's former transportation chief who now leads Friends of the Underline, put the scale of the project in blunt terms in an interview with Governing magazine:

"I tell people that there are over 2,000 transit agencies in the U.S. and there's only one Underline."

That framing matters for anyone living within walking distance of the Brickell segment right now. The county isn't treating this stretch as finished infrastructure to maintain. It's treating it as the proof of concept for a project it's actively expanding, which is why the programming keeps stacking up rather than thinning out. A market that started as a modest weekend vendor stop now runs on a published calendar through mid-October. A yoga class scheduled more than a year out signals a level of institutional commitment you don't usually see attached to a stretch of land under a train line.

The habit most residents haven't built yet

The gap between what's available and what residents actually use comes down to visibility. A building amenity is advertised in the lease, mentioned at move-in, and printed on a laminated card by the pool. The Underline's schedule lives on a county events calendar and a nonprofit's website, which means most people who live two blocks away have never seen it.

That's a real cost. Brickell residents are, by and large, paying for private recreation space through HOA fees whether they use it or not. The free alternative sitting under the Metrorail tracks isn't a lesser substitute. It's a different kind of amenity entirely, one that changes composition weekly instead of sitting static, and one built to grow rather than depreciate. A rooftop pool doesn't get more useful over time. A ten-mile trail with a market, a stage, and a fitness calendar does, especially as Phase 3 connects it to Coral Gables and Kendall later this year.

If you've lived in Brickell for a while and your mental map of The Underline stops at "the path with the basketball court," it's worth checking the actual schedule before assuming you know what's there. The market runs through October. The yoga class runs into 2027. The neighborhood's best recurring plan for a Saturday morning might not be inside your building at all.

For anyone weighing what daily life in Brickell actually looks like beyond the skyline photos, our Brickell neighborhood guide covers the broader picture, and Vanessa Frank is always glad to talk through what a specific building's proximity to spaces like this one is actually worth day to day.