Yes. It's called Trestle Bike Park, in Winter Park, CO. Flowiest place I've ever been.
Angel Fire will have some flow trails, too, but if you want tons of flow and less chunk, go to Winter Park.
Also, if you shuttle Pike's Peak, there's some long DH trails that resemble those in the video. It costs $10 per person to drive in and you'll want somebody to drop you off at the top, so you can ride back to a car at the bottom of the trail in town. I shuttled one of the less-known/less popular DH runs there:
There was about 30 minutes of steep hike-a-bike uphill in the ride, but it was the longest shuttle ride I've ever done. It's not all flow - some good chunk too.
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Closer, "natural," and free:
Monarch Crest Trail west of Salida, CO. Starts at 12,000+ (top of the pass) and goes up (but not too much) from there. Loooooong ridge above treeline with AWSOME views, good flow, then multiple options to drop in from there for several thousand feet of descent. Everything from rocky, technical stuff to flowy buff stuff, up to ~36 miles in length. Shuttle required unless you're doping and want to Lance Armstrong your ass back up Hwy 50 for a 6,000+ vertical feet and 50+ mile day.
As with all alpine rides, you want to be off the ridge by ~11am and done with your ride by ~2pm or risk T-storms and hail. Well...in normal years, anyway...this drought sucks.
Grab a trail map in one of the outfitters in Salida. I'm at work, or I'd give you the name of the one I have -- it's awesome -- it has trail descriptions and annotated pics of all the junctions.
You could try Sand Canyon. A few short climbs, not much elevation change, and you get to ride right up to some ruins. Lil' Bando's might enjoy that. Not a lot of shade. DON'T take the trail to "Sand Canyon Pueblo", that one has a climb and as is a lot of hike-a-bike. Take the route to the left which is *I think* West Rock Canyon. There are occasional spurs where you can walk right up a ruin or two...
Not of Phils, it's actually a state monument or something similar, on the other side of Cortez. Pretty sure you can't camp there though. I've never really camped around there - I know you can camp at Mancos State Park, and I think McPhee Reservoir, but not sure it's open this "early".
I'm supposed to head up a ride for a bunch of videogamers (ie: geeky teenagers) who ride a few times a year. They wanted to hit Durango trails (which would suck to watch them push and whine all day). They've decided that they wanna do Phils - I'm not expecting to get too much stoke (hard to do while babysitting) but maybe some baby stoke in a few areas. Plan to run the SS...
Any recommendations for which loops to hit would be good... I'm sure your 'lil bandos will out shred my nerds.. so let me know what they enjoyed. Muchas Gracias