Campground · CO
Rocky Mountain National Park Aspenglen Campground
CO · Rocky Mountain National Park
Rocky Mountain National Park Aspenglen Campground is generally easy to book. Across the 10 months we have reservation data for, difficulty peaks in September (7/10) and eases to its lowest in February (1/10). The heat strip below breaks down every month — pick one for its full odds, lead-time chart, and easier nearby alternatives.
Booking difficulty by month
Midweek tip: in the busiest month (September), arrivals are lightest on Wednesday — shift your dates to improve your odds.
When reservations open
Booking window
Reservations open on a rolling 6-month window at 7:00 AM America/New York.
For example, sites for February 15, 2027 become bookable on August 15, 2026. Set a reminder a few minutes before release for the best shot.
Standard Recreation.gov 6-month rolling window: sites become bookable 6 months before arrival at 7:00 AM ET.
Sites & amenities
- 15 tent-only sites
- 54 RV sites
- 3 accessible sites
- Max RV length 30 ft
Activities: FISHING, CAMPING, AMPHITHEATER, ACCESSIBLE SWIMMING, BACKPACKING, BIKING, CANOEING, EVENING PROGRAMS, GUIDED INTERPRETIVE WALKS, KAYAKING, WILDLIFE VIEWING, MOUNTAIN CLIMBING, INTERPRETIVE PROGRAMS, PICNICKING, RANGER STATION, SKIING, SNOWSHOEING, WILDERNESS, DAY USE AREA, VISITOR CENTER, HORSEBACK RIDING, HIKING, SCENIC DRIVE