I'm assuming that you've already taken your friendly MX lap around Emma Long and I'd love to hear your take.  But IMHO its much more defiicult that 1/4 Notch.  After all, 1/4 Notch was given that monikor for a reason. 🙂   Double Down might be more comparable but even then, City Park is unique in many ways.   As someone who owns an enduro bike and has frequently (in the past) ridden out there on both types of 2 wheeled machines, if you are a competent dirt bike rider then its not too bad.  I've always loved riding the super tech MTB stuff, so I found that 35HP with 12" of suspension and bike luggy tires made CP feel much more easy than pedaling around a 2.2" wide tire on a hardtail MTB with 80mm of suspension like we all did back in the day.   All that said, in the moto world, City Park is the crazy insane stuff that only seasoned technical riders choose to ride (at least thats how that community views it).  YMMV Cheers, CJB    

Yeah, I was not recommending a motorcycle at WC. Although I have seen several over the years...

John, I'm gonna take the counter to telling someone to go ride his borrowed motorcycle at Walnut Creek or unmentionable trails.  😉 As far as the rain advice goes for CP, you'd know better than me b/c I haven't ridden it wet in over a decade.  Like you said, though, it was pretty good back then.  I guess not anymore.

NEED FOLKS TO DO THIS SURVEY !! https://www.lowercoloradowrap.org/   The main thing to comment on is to extend the lakeside hike & bike trail all the way to Webberville, maybe even Bastrop. It’s a big ask, but it’ll never happen unless local governments buy more land or easement rights along the Eastern Colorado River.   On behalf of Austin Ridge Riders, I have attended a couple of the in-person meetings.  There are folks who want to improve/protect the river itself (let's call them the River People); the Anti-Gentrification NIMBYs (who seem to want zero changes that might encourage more people to move further east); and then there are the Trail People.   We need to make sure that there are plenty of voices in the survey focused on a long-distance riverside trail.     Imagine: Lady Bird Lake hike & bike trail is continued all the way to Webberville or even Bastrop (but with separated bike and hike paths in key locations, or perhaps the whole way). Bolm District Park is built out with the bike park facilities in the vision plan (pump & jump track, skills loop, concrete skate/bmx park, etc.) The Treviño Park vision plan gets implemented, with trails.  

I'm gonna take the counter on the rain comment.  Back in the day I remember CP being the trail for riding post rain, I even remember being caught in a storm mid-lap and finishing with no issue. But the last time I tried it (~1-2 days post rain) is was a sopping goopy mess. Definitely not easily rideable.  I actually found that WC was more rideable than CP after rain, sadly. There are other trails, non-mentionables, that are better post rain. And, depending on how well you pick your route, the greenbelt is amazingly resilient in some cases. But that is ONLY for people that really know how the trail reacts to rain. If you aren't aggressively monitoring both rainfall patterns and routes, then stay away from BCGB after rain.