Decomposed granite – This paving material is popular for use as an informal path and is relatively easy to install and maintain. The benefits of decomposed granite include low installation cost, “soft” appearance and good porosity that allow water to penetrate through to the soil below. This is especially important when paving near older native trees such as oaks. https://southwestboulder.com/blog/how-to-install-a-decomposed-granite-pathway