A process for the production of a higher hydrocarbon from solid biomass, the higher hydrocarbons being hydrocarbons having an oxygen to carbon ratio less than the oxygen to carbon ratio of at least one component of the biomass feedstock, said process comprising: a. providing a biomass solid containing cellulose, hemicellulose, and lignin; b. digesting and hydrodeoxygenating the biomass solid in a liquid digestive solvent in the presence of a hydrothermal hydrocatalytic catalyst and hydrogen at a temperature in the range of 110°C to less than 300°C and at a pressure in a range of from 20 bar to 200 bar, said digestive solvent containing a solvent mixture having a boiling point of at least 40°C, to form a stable oxygenated hydrocarbon intermediate product having a viscosity of less than 100 centipoise (at 50°C), a diol content of at least 2 wt.%, less than 2wt.% of sugar, and less than 2wt.% acid (based on acetic acid equivalent), based on the intermediate product, and at least 60% of carbon exists in molecules having 9 carbon atoms or less; c. separating the stable oxygenated hydrocarbon intermediate product to an organic rich phase and an aqueous rich phase; d. reacting at least a portion of the aqueous rich phase with an acidic amorphous silica alumina catalyst at a temperature in the range from 300°C to 400°C thereby producing monooxygenate-containing stream comprising water, organic monooxygenates, and unsaturated aliphatic hydrocarbons; e. contacting at least a portion of the monooxygenate-containing stream with solid acid condensation catalyst at a temperature in the range from 275°C to 425°C producing a higher hydrocarbons stream; and f. contacting at least a portion of the organic rich phase with solid acid condensation catalyst at a temperature in the range from 275°C to 425°C producing a higher hydrocarbons stream. a. providing a biomass solid containing cellulose, hemicellulose, and lignin; b. digesting and hydrodeoxygenating the biomass solid in a liquid digestive solvent in the presence of a hydrothermal hydrocatalytic catalyst and hydrogen at a temperature in the range of 110°C to less than 300°C and at a pressure in a range of from 20 bar to 200 bar, said digestive solvent containing a solvent mixture having a boiling point of at least 40°C, to form a stable oxygenated hydrocarbon intermediate product having a viscosity of less than 100 centipoise (at 50°C), a diol content of at least 2 wt.%, less than 2wt.% of sugar, and less than 2wt.% acid (based on acetic acid equivalent), based on the intermediate product, and at least 60% of carbon exists in molecules having 9 carbon atoms or less; c. separating the stable oxygenated hydrocarbon intermediate product to an organic rich phase and an aqueous rich phase; d. reacting at least a portion of the aqueous rich phase with an acidic amorphous silica alumina catalyst at a temperature in the range from 300°C to 400°C thereby producing monooxygenate-containing stream comprising water, organic monooxygenates, and unsaturated aliphatic hydrocarbons; e. contacting at least a portion of the monooxygenate-containing stream with solid acid condensation catalyst at a temperature in the range from 275°C to 425°C producing a higher hydrocarbons stream; and f. contacting at least a portion of the organic rich phase with solid acid condensation catalyst at a temperature in the range from 275°C to 425°C producing a higher hydrocarbons stream.