The central highlands are a significantly less populated and economically developed area in the north, between Lake Nicaragua and the Caribbean. Forming the country's tierra templada, or "temperate land", at elevations between , the highlands enjoy mild temperatures with daily highs of . This region has a longer, wetter rainy season than the Pacific lowlands, making erosion a problem on its steep slopes. Rugged terrain, poor soils, and low population density characterize the area as a whole, but the northwestern valleys are fertile and well settled.