The ultraviolet absorption spectra of Pr3+ in CaF2, SrF2, and BaF2 have been measured at room and liquid-nitrogen temperatures. These spectra are similar to those of Ce3+ reported previously except that Pr3+ absorptions generally occur at higher photon energies. This general similarity between the uv absorption spectra of Ce3+ and Pr3+ in solids indicates that the crystal field is dominant in the higher configurations, 5d and 6s, of rare-earth ions in solids. For Pr3+ in CaF2 the three interconfigurational transitions are: (1) 4f-->5d between 44 000 and 69 000 cm-1; (2) a possible 4f-->6s at ~76 000 cm-1; (3) a charge transfer F-(2p6)-->Pr3+(6s) near ~80 000 cm-1. Other effects, such as vibronics in the lowest 4f-->5d band and their concentration dependence, the effect of cluster formation on 4f-->5d bands, and the crystal effect on the free-ion data, are all similar to the previously reported data on Ce3+ in alkaline-earth fluorides. The cross section of 1S0 absorption of Pr3+ in CaF2 is estimated to be concentration-independent, which is consistent with the shielded character of 4f-->4f transitions. Absorption to the 1S0 state and the vibronics are also observed in BaF2:Pr3+.