The ahuehuete — Taxodium mucronatum, the Montezuma cypress — is the national tree of Mexico and was planted, in the late nineteenth-century Porfiriato remake of the southern colonias, along Álvaro Obregón, Orizaba, and the central camellones of the Roma. The mature specimens are now around a hundred and twenty years old, with trunks two meters across and a high, drooping canopy that holds full leaf year-round in this climate. Interspersed with the ahuehuetes are fresnos — Fraxinus uhdei, the tropical ash — planted as the medium-fast street tree behind the cypresses. The combination produces what arborists who measure these things call the densest continuous street-tree canopy of any neighborhood in the Valley of Mexico. The functional consequence is that the central blocks of Roma Norte, even at 2 PM in May when the city is at its hottest and the UV index is in the elevens, read in the upper twenties Celsius under the trees.
The picks below string those blocks. The premise is the long lunch / afternoon café crawl that Roma Norte is built for. Each pick ends at a café or panadería with sidewalk seating that the canopy actually reaches; Stay Cool flags the few that look shaded on the satellite but, in practice, have their tables in the gap where a tree was lost in the 2017 earthquake and not yet replaced. There are more gaps than the marketing photos show.
A note on the wider geometry. Roma Norte is on the eastern edge of what used to be Lake Texcoco; the soil is sinking unevenly, the older buildings tilt visibly, and the streets are not always at the angle the grid suggests. The shade percentages below are computed against actual building lines, not the cadastral ones. In practice that means a few of the routes prefer the south side where the grid would predict the north.