I responded to one of your posts the other day about Brighton--lots of amazing places in Utah to run. Some personal favorites are at the top of Brighton; Big Mountain [SLC/Morgan County line]; White Pine and Red Pine [LCC]; and Zen [St. G]. Tons of good options in PC as well (although it's too early for any of those I just listed).
It's early for wildflowers, although they're starting to show on the BST in SLC--Dry Creek to City Creek is a great run, with great views and emerging Balsam Root. Balsam Root at lower elevations is probably about all you'll find in North Utah for now