La Milpa is an archaeological site and an ancient Maya city within the Three River region of Northwest Belize bordering Mexico and Guatemala. La Milpa is located between the sites of Rio Azul and Lamanai. Currently, La Milpa lies within the nature preserve owned by the Programme for Belize, a non-profit organization. Following Caracol and Lamanai, La Milpa is the third largest site in Belize with the Main Plaza alone covering 18,000 square meters, making it one of the largest in the entire Maya region.
The site is situated on a ridge roughly 1 km across, running from North to South, with the drainage going to the western side. There are no natural water sources within the site, however there are two large aguadas that would have held water through the dry season. While there are no other permanent water sources, in 1992 Vernon L. Scarborough investigated the possibility of two other reservoirs which were initially stone quarries thought to retain water.
The site is structured with the Petén-centric site plan, meaning a northern grouping of buildings surrounding the main plaza (Plaza A). This plaza is over 18,000 square meters and could have held upwards of 17,000 people. On the eastern side of this plaza are the construction of three large pyramid temples surrounding a fourth in the center in the middle of the plaza. The southern part of the plaza consists of a range of building while the northern part contains low walls that make up the northwest corner of the plaza.
South of the Great Plaza, lies another group of buildings, which consist of three open plazas with enclosed courtyards. This are had only one pyramid and no stelae or altars. This area was not of interest until later in the project when research goals did include the southern region of the site center as well as the hinterlands that were within the 6 km radius from the center.