We've analyzed all of the Ebird data from 2015 and determined which birding hotspots in Boulder County, CO had the most bird sightings.

1. Walden Ponds Wildlife Habitat (Walden & Sawhill Ponds all together)
2. Waneka Lake/Greenlee Preserve
3. Walden Ponds Wildlife Habitat--Cottonwood Marsh/Wally Tove's Pond/Duck Pond
4. Golden Ponds Park and Nature Area
5. Teller Farm & Lakes
6. McIntosh Reservoir
7. Sombrero Marsh & Pond
8. Rabbit Mountain
9. Boulder Reservoir complex--Boulder Res
10. Valmont Reservoir Complex
11. Boulder Creek--75th St.
12. Old Saint Vrain Road
13. Skunk Canyon Trails
14. Stearns Lake
15. Lagerman Reservoir
16. Louisville (town)
17. White Rocks Trail area
18. University of Colorado Boulder--Kittredge Lake