Mountain - Plains - CO - Littleton - Long Straight Roads For 2x20s

So I've mostly stayed on the MUPs like the C-470 trail but there are quite a few lights and lots of other walkers/cyclists.

I know of Monarch/Daniels Park Rd but it is fairly hilly, although I guess it isn't that big a deal, just makes controlling heart rate a little tougher. Are there any good long, flat roads, preferably with a shoulder that I can get to by bike around the Littleton/Highlands Ranch area with minimal stops? Mainly looking for a place I can do 2x20s outside and avoid my trainer and MUPs when the weather is nice.

So I've mostly stayed on the MUPs like the C-470 trail but there are quite a few lights and lots of other walkers/cyclists.

I know of Monarch/Daniels Park Rd but it is fairly hilly, although I guess it isn't that big a deal, just makes controlling heart rate a little tougher. Are there any good long, flat roads, preferably with a shoulder that I can get to by bike around the Littleton/Highlands Ranch area with minimal stops? Mainly looking for a place I can do 2x20s outside and avoid my trainer and MUPs when the weather is nice.

Wadsworth from C-470 (actually from the Chatfield entrance to the Waterton Road). Relatively flat and with a wide shoulder. You can map a profile here (http://www.heywhatsthat.com/profiler.html).

Wadsworth from C-470 (actually from the Chatfield entrance to the Waterton Road). Relatively flat and with a wide shoulder. You can map a profile here (http://www.heywhatsthat.com/profiler.html).

Another good candidate would be the frontage road to I-25 from Castle Rock to Toma Road. Either side would be good, however, the east side of the highway gets slightly less traffic from what I've observed. The road is relatively level with a slight rise to the south.

Thanks guys, completely forgot about Wadsworth and the frontage road looks good.

Anyone ride Perry Park Rd/Hwy 105 often? Looks like it might be nice, just not sure about the traffic.

I live in Lone Tree and really like the Perry Park/105 route. It is a great road, not much shoulder but still fairly bike friendly, thing is you have some climbing to get there and back via Monarch/Daniels Gate. You can make some nice loops down there via Thoma/Walsenberger.