Here's Pam Hostetter’s info on the USTA league:
Finally USTA in SLO county! Women's and men's leagues begin soon (team lists due 9-10-2017)
Already there are teams organizing in Paso, Templeton, A.G., SLO and Avila.
Gender doubles: 18 years & older
3 doubles lines 2.5/3.0/3.5/4.0/4.5
65 years & older
3 doubles lines 6.0/7.0/8.0/9.0
I would be willing to work with (take names, numbers and organize) for the women's 3.5 and 4.0 team