There's a chance the grass is a Brome (Bromus), possibly B. tectorum, but that's just a guess because there are not enough plant characters present in those photos or supporting details like location, habit, size, etc. to make the identifications. The photos however are striking. 

Ok, thank you! Most of them are taken along the Farmer's canal in Westminster, CO.

Sorry, that doesn't narrow it done enough; I need leaves, flower color, stem, fruits and size if you want accurate IDs. The one with the umbel is probably in the Apiaceae family if that's any help to your project.