not knowing why you're going to Denver (business, vacation, family visit), I'd suggest renting a car (reserve in advance to get the lowest prices). Great spots I cannot give you, but you might want to check out the Denver RTD stations Pepsi Center, Alameda Station (UP trackage across the RTD tracks), or just down the street: Broadway Station.
You can also try Globeville Rd. near the La Quinta Inn. There's a yard right next to the river there. This one isn't far from the Union Station.
West 48th Ave. crosses a yard on an overpass just northwest of where I-70 & I-25 intersect, looks like a good place to do some fanning. The last one can be reached by bus from Union Station in about 20 minutes.
Anyway, let me know if you found a good spot. I'd like to check it out myself the next time I'm in Denver.
Hi Dutch Steamer,
I can give you some recommendations in town, and acessible by public transit, but I think you might miss some of the fun of Denver railroading. Heading out on the Moffat Sub is a great experience because the scenery is spectacular. Based on your name, I'm guessing that steam locomotion might interest you. If so, trips to the Colorado Railroad Museum and the Georgetown Loop would also be nice excursions.
I probably could get a couple days off in August if you wanted to head out and check out some of the sites. Drop me a PM or an e-mail if you're interested.
"A great photograph is one that fully expresses what one feels, in the deepest sense, about what is being photographed." ~Ansel Adams