Eleven Travis Peak sandstone core samples from the Holditch Howell No. 5 well, designated GRI Staged Field Experiment (SFE) Number 1, were analyzed in the laboratory at IGT for porosity, permeability, stress dependence of permeability, and the relationship of these to observable features in the pore geometry. Dry permeabilities of the SFE #1 core received by IGT ranged from about 20 ~d to about 30 d, and gas porosities ranged from 8% to 18%. Most of the permeabilities were too high for our apparatus to measure in the automated mode, and required time-consuming, manual flow rate timing with a stopwatch. Despite the difficulties inherent in manual flow measurements, we were able to collect enough data to assemble a number of observations on the relationships between the pore geometry of higher permeability tight sands and gas movement through the pores. Specifically, although the SFE III core contains "slot" pores, they are not the major flowpath for gas, which is able to make its way directly between solution pores and through relatively unobstructed primary porosity. Sands containing flowpaths of this nature showed a much lower stress-dependence of permeability than those dominated by slot pore flowpaths. Mercury porosimetry data indicate that the SFE #1 samples represent a transition zone in pore geometry between "slot pore" tight sands and Ilgrain-supported" pores found in conventional sandstones. We believe that recognition of the petrologic properties of transitional sands will help improve the ability to assess tight sandstone reservoir quality using low cost petrographic and porosimetry techniques.