Great trails with some great short climbs if you opt for them. Most trails would be great on a mountain bike as well as trail running. So many trails and forks that you can't hope to keep straight on any trail but the Yellow, Blue, or PowerLine. Very Busy even on a Monday afternoon right after lunch. there is an additional parking lot to the North of the main lot with the toilets if it is full.
To preface this, we are used to hiking and backpacking in places like the Cascade Mountain Range of Washington state. Having said that, although it's not a mountainous region with the views that come with that, this is a great, well done little trail system for Oklahoma and being so close to Tulsa. You could spend all day here with plenty of trail options. To make it physically worth your time, you'll want to combine the other trails with the Blue.