Open Year-round
Reservations possible?
RV Hookups
Potable water
Please respect the outdoors by practicing Leave No Trace. Learn more about how to apply the principles of Leave No Trace on your next outdoor adventure here.

The stepchild of its two sisters, Big Rock Campground is little more than an overflow camping area for the Arapaho Bay Campground complex, with Roaring Fork Campground being the most popular and Moraine Loop Campground being a close second in popularity. Big Rock itself is a cluster of 22 campsites under a grove of lodgepole pine with a vault toilet, and big rock (giving the park its name). Each site is spacious, but unlike the other two campgrounds at Arapaho Bay, Big Rock provides no views or direct access to Lake Granby, although neither are far away. For potable water, you'll just need to head a quarter mile up the road to Roaring Fork Campground.

From the campground you venture deep into the Indian Peaks Wilderness via the Arapaho Pass Trail, Cascade Creek Trail or Buchanan Pass Trail, all of which depart from the Monarch Lake Trailhead. Or, if you head up to Roaring Fork Campground, you can also venture up the there-and-back Roaring Fork Trail - an easy jaunt to see pristine Rocky Mountain cascades.

Other campgrounds on the reservoir include:

Arapaho Bay: Big Rock Campground is operated by American Land and Leisure. Call 801.226.3564 for more details.

Logistics + Planning

Preferable season(s)



Occasionally full

Open from

May 21 to October 18

Price per night (basic site)

21.00 $ (17.63 €)


Overflow campground for Moraine Loop and Roaring Fork Campground.


No views or direct access to Lake Granby.

Pets allowed


Managed by

U.S. Forest Service


Family friendly
Vault toilet
Near lake or river



Total number of sites


Maximum trailer length

30.00 ft (9.14 m)



Watch your wallet with the Host Bob. Make sure you show up on time or he will sell your reservation out from under you. We were 15 minutes late to find another camper unhooked in our sight. All of you who have backed, leveled and unhooked a camper no this is impossible. This policy for the camp grounds is a bunch of shit. We drive 3 hrs to not have a spot. The coward host hid behind the bullshit policy.
Have updates, photos, alerts, or just want to leave a comment?
Sign In and share them.