The Gray Hairstreak of the most common hairstreaks in North America, although they are found throughout the world. They have a large variety of host and nectar plants, which include peas and mallows. The caterpillar is fuzzy and reddish in color. This one is on a Wild Blue Flax wildflower.
These wildflowers are a few I see in the forest area behind my home. There are many Ponderosa Pines as well as some mountain meadow areas.