2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/97063The recent availability of accurate proper motion catalogs for millions of stars on the sky (e.g. Tycho-2, UCAC) can benefit projects for which age estimates are needed for stars that are plausibly young (<100 Myr-old) and within a few hundred pc of the Sun. Here I summarize how accurate proper motions have been useful in (1) identifying new, nearby, post-T Tauri star populations, and (2) estimating distances to young field stars which are lacking trigonometric parallax measurements. The later enables the calculation of stellar luminosities and isochronal ages -- two quantities critical for investigations of the evolution of star/planet/disk systems.4 pages, 1 figure, ASP Conf. Series "Astrometry in the Age of the Next Generation of Large Telescopes", eds. P.K. Seidelmann & A.K.B. MonetAstrophysicstext