This paper reports recent results in the development of a picosecond short cavity dye laser designed to operate in the 400-500 nm range. The short cavity dye laser is axially pumped with a single Nd+3: glass third harmonic pulse of 11 ps. The output pulse duration, measured with a light gate, is less than 13.8 ps. A theoretical analysis of the laser rate equations is presented which indicates that this blue output pulse may be as short as 1.5 ps and transform limited. single and multiple mode operation are reported with individual mode bandwidths of ≈0.2 nm. Gross tuning of the laser is accomplished by changing dyes and demonstrated for the spectral region of 396 nm to 470 nm. Finer tuning is accomplished by changing the cavity length, while the finest wavelength selection is produced by changing the pumping angle. The maximum energy conversion efficiency measured is ≈6%. This laser should be useful as a broadband source for picosecond spectroscopy of solutions or a nar-rowband source for excitation of gases or low temperature crystals. No practical source of high-power, tunable picosecond pulses in the spectral region of this laser has been previously reported.