We report on measurements of the electrical and optical properties of BaPrO3. The temperature dependences of the electrical conductivity sigma and the Seebeck coefficient of polycrystalline samples were studied over a wide temperature range (300 degrees C-1050 degrees C). At lower temperatures, the observed charge transport can be described as thermally activated hopping of electron-based small polarons with an activation energy of 0.37eV. An observed change in temperature dependence of both sigma and around 700 degrees C was observed and interpreted as a transition from extrinsic to intrinsic carrier transport. The intrinsic conduction can be modeled with an apparent electrical band gap of similar to 2eV. Optical absorption and emission spectroscopy in the UV-VIS-NIR range revealed a series of characteristic absorption thresholds and the type of optical transitions was identified by combining transmittance and diffuse-reflectance spectroscopy methods. An absorption edge of indirect type with onset at 0.6eV is attributed to small polaron effects. The higher lying absorption thresholds of direct origin positioned at around 1.8 and 3.8eV are correlated with thermal activation parameters from electrical measurements and discussed in terms of the band gap of BaPrO3.