Hiking/Camping Groups in their 20s?

Hi all,

Recently moved to Houston a few months ago. I've never been a big outdoors person but started to enjoy hiking more before I came down here. I want to get more into hiking and camping so I started looking into groups on MeetUp and Facebook, but they all either seem inactive or filled with people 40+. I'm a 25M so I'm looking for any groups, formal or informal, centered around hiking/camping/outdoors etc. that are more my age.