During the winter season Rocky Mountain closes through roads but you can still enter from the east side from the legendary Estes Park. You can also enter from the west side near Grand Lake.
You most likely are not going to be summiting Longs Peak during the winter, but there is still plenty to do while exploring this famous National Park. 
If you’re coming from the east entrance looking to get into some trout be sure to check out the Kirks Fly Shop here you will not find employees who withhold current advice but genuinely care and want to get you into some fish. Be sure to stop by grab some merch and what ever flies the fish are taking. Because it’s pretty cold a lot of the local rivers are frozen, but a good place you could check out is below the Big Thompson River below the Drake. Colorado fish are picky so best of luck!
Another activity you can check out is snowshoeing. There are several turquoise blue lakes up in Rocky Mountain. Go Explore It can provide snowshoes for you to get to those parts of the park.
Of course there are several actives to check out within the park but lastly we will leave you with cross country skiing. You are able to rental polls, skis, and a helmet for under $50.
Don’t let the winter blues get you down. Let us provide you with an adventure of a lifetime,
Go Explore It.