We, my family, friends, and I, absolutely LOVE this trail and feel so fortunate to live so close to it (off Milliken & north of Baseline). Rancho Cucamonga has really shined, wonderfully exceeding its obligations to the Trail.
Although we love having all of it available to us, as pointed out in other reviews here the other cities' work on the Trail is clearly woefully inadequate when compared to the quality of the Trail and its amenities in Rancho. With all of its wealthy neighborhoods and the attendant high property tax revenues coming into its budget, you would think Upland, at least, could have done a much better job in its construction and maintenance... but they simply didn't. Upland obviously chose the low quality, go "cheap" (and much less safe) now, pay (much more) later plan, and the resultant differences, now and later, are and will be very clear.
Throughout all of Rancho, you will find several great characteristics. Among them, the Trail has a wide all-concrete trail right alongside of and parallel to an equally wide dirt-gravel trail. This accommodates, walkers, joggers, runners, bladers, boarders, horseback riders, and all other users equally well. The concrete, while initially more expensive than asphalt, is very smooth with clean edges and will last virtually forever in our climate, with little or no maintenance. If the gang artists subject it to graffiti, it is easily cleaned with sandblasting or paint removers without any long-term damage to its composition or appearance. The Trail is extremely well-lit, making it also a pleasure to ride at night. All street crossings are light-controlled and programmed for very quick responses to any Trail user pushing the button(s), have very clear crosswalks, and they have audible tones allowing vision-impaired folks to know what's happening as well. Buttons are available both high (for horseback riders) and low (for the rest of us). There are water fountains placed every so often making it unlikely that you'll run out of water. Virtually every time I've ridden the Rancho section during business hours I've seen maintenance being completed (including lights being checked/replaced this morning). There are many other positive points, but you get the picture... it's GREAT!
In stark contrast, the Upland section is definitely "less than". Just check out the transition from Rancho to Upland (or vice-versa) at Grove Avenue and you will clearly see this for yourself. The Upland Trail section is narrow and almost exclusively limited to being made of uneven asphalt with lots of "bumps", rough edges, a fair number of potholes and/or broken sections, and an incredible number of areas painted over, in various non-matching paint shades, to cover the extremely abundant formerly graffiti-inscribed sections. The asphalt is poorly maintained and will become more and more expensive to maintain as time goes on. Much of the Trail there is unlit, or not well-lit, and/or has inoperative lighting. As far as road crossings, there are virtually none in Upland that are of anything remotely near the quality of those in Rancho. MANY of the crossings, I believe MOST actually, even in "old downtown" Upland, DON'T EVEN HAVE CROSSWALKS designating them!!! Vehicle drivers generally completely ignore the Trail users waiting to cross... probably not unreasonably thinking "no crosswalk, no right-of-way". Further still, Upland has placed "STOP" signs for the Trail users at virtually every road crossing, and even Trail junctions. I could go on and on, but I think I've made my point.
While I love having any trail on which to ride my bike rather than no trail at all, and I DO THANK UPLAND for the contributions that city has made to the project, the residents of Upland must be at least a bit embarrassed as a result of how little forethought, effort, and funds seem to have gone into the Trail through their city.
I have not yet ridden the Fontana section, so I cannot speak to its condition or amenities, but will be checking it out soon. Hopefully Fontana has followed Rancho Cucamonga's example rather than Upland's!
In my opinion, as the "human community" we need to do everything reasonably possible to get all of our citizens "out and active". We'll all be generally more healthy and happy, and spend far less on medical and mental health care, if we do so. Making this Trail as useful, safe, and enjoyable as possible is a GREAT, readily available contribution toward that goal! I can't wait until it is all fully completed and "up to snuff".