My $.02 on the subject -
No one should feel like they shouldn't sign up and show up for a ride,
unless the ride is specifically posted as being for a certain level. Not
every trail is the same, so there will be rides that folks of a certain
fitness/skill level shouldn't go on - and those rides should have that
info posted in BIG LETTERS.
Marshall Mesa, for example, is not one of those trails. It's a great
every-level trail. But, anytime you have a group of folks show up that
have fitness/skill levels ranging from novice to
omg-your-calves-look-like-they're-carved-out-of-stone, it's best to
self-organize into at least two groups, have someone designated as
leader for each group - and for the slower groups, have someone
designated as sweep rider as well, to ensure nobody gets left behind due
to coughing up a lung, or mechanical issues. There are few things more
frustrating to a new biker than getting dropped and having no idea where
the folks in front of you have gone. Have the lead rider stop at all
intersections where the route takes a not-obvious turn. Either let the
rest of the group catch up, or leave one rider at that intersection to
direct the trailing riders to go that-a-way.
That said, I'd love to see some more rides posted. I'm just getting back
in gear (ha ha bike pun) and it's been a while since I had a regular
crowd for trail rides. It's more fun to ride with other folks (and to
share beers with afterwards)! Maybe start having a regular rotating
weekend ride on either Saturdays or Sundays, so folks can plan ahead.
Bounce around trail systems from week to week.