I went around the internet looking for these plants, but found no results. They are growing in our front yard and I want to know if i'm growing edible berries or poisons. Colorado, US 13672108_1754686564809804_388363599_n.jpg 13672591_1754686568143137_1218565880_n.jpg (Edit: The berries are around the size of a U.S quarter.)
The first is Sorbus of some sort, not poisonous. [Edited: Re: the second photo,] I keep accusing posted fruits of being plums. I wasn't right on the previous one, but maybe this one? You could cut it open and see if the pit looks like a plum.
The Colorado State University Database lists Sorbus scopulina (aka Sorbus aucuparia) as a native mountain ash tree. See: Southwest Colorado Wildflowers, Sorbus scopulina for photos that look very similar to yours. It grows into very attractive small tree - there are lots of websites that tell all about it.
First is a rowan (Sorbus sp.; edible but not palatable - use for making jam), second a Cherry-plum (Prunus cerasifera; edible and can be very nice).