@NickVidal Congratulations on Enrax’s first Mentorship program! 
@Megan_Lehn brought up a great point in her topic here:
If we can better understand the future plans for our mentees, we can cultivate a stronger relationship with them. We are working on developing an LFX Mentorship and LF Training partnership to offer discount codes for training material that may be of interest to mentees. So offering discount codes and free training material to mentees can be a great way to keep in touch!
Another great way to possibly build relations with graduating mentees and even attract future mentors for your project is holding a Mentorship showcase event. Highlighting your mentee experience and accomplishments with other contributors or partners associated with your project.
LFX is holding a mentorship showcase using LFX Events on the 12th and this is great for highlighting mentees and also potentially attracting future mentors.
If you have time, I would definitely signup for the showcase!
From your efforts and our few conversations, I have a good feeling your program be great Nick!