This beautiful valley of the Yellowstone River provides climbers with a selection of diverse and enjoyable climbing experiences, from clipping bolts at Allenspur to big, hard, granite free climbs on Mount Cowen.
Sandwiched between the Gallatin Range on the west and the Absaroka/Beartooth Range on the east, the season here is as diverse as the climbing. Generally, temps in the valley are a bit milder than the Gallatin Valley, allowing for a slightly longer traditional rock season and even occasional winter days at the low crags of Allenspur. Mill Creek is located further up in the Absaroka/Beartooth mountains and has a more traditional summer season (late May through October). The alpine rock routes of Mount Cowen are subject to the intricacies of mountain weather and snowpack, with July and August beimg best.
Pay camping can be found throughout the valley, with good free options up Mill Creek past the climbing area.
Besides the awesome climbing and backcountry ski opportunities, two of my favorite things about Paradise Valley are soaking in Chico Hot Springs (a few miles south of Mill Creek) and eating at Mark's In and Out in Livingston, both easily combined with a climbing excursion.
I-90 provides the general access point to Paradise Valley from the north, east, and west. Exit at any of the Livingston exits and head south on Highway 89. Refer to specific areas for directions from here. From the south, it's possible (and recommended if time is available) to enter the valley from the south via Yellowstone National Park. The diversity of scenery is unmatched.