The Underline
| The Underline | |
|---|---|
 The Underline, near Brickell station, December 2022 | |
| Length | 10 mi (16 km) |
| Location | Miami, Florida, U.S. |
| Trailheads | Miami River Greenway Dadeland South station |
| Use | Linear park, shared-use path |
| Waymark |  Bike Route M |
| Surface | Asphalt |
| Right of way | Metrorail |
| Maintainer | Miami-Dade County |
| Website | theunderline |
The Underline is a 10-mile-long (16 km) linear park under development in Miami-Dade County, Florida. When completed, it will run beneath the county's elevated Metrorail system between the Brickell neighborhood of Downtown Miami and Dadeland South station in Kendall. The project converts a pre-existing bicycle and pedestrian path known as the MetroPath or M-Path. At Dadeland South, the Underline connects with the South Dade Trail forming a continuous corridor extending south to Florida City.
The first phase of The Underline, located in the Brickell area, was completed on February 26, 2021. The second phase, extending from Brickell to just south of Vizcaya station, opened on April 24, 2024. The third and final phase is scheduled for completion in 2026.