Some Nets I like to participate in -

Day Time Frequency Group
Sunday 9:00 AM 147.225 Colorado Repeater Association
  7:00 PM 147.225 APRS Net
  7:00 PM 147.270 Longmont Amateur Radio Club Tech Net
  8:00 PM 147.270 Longmont Amateur Radio Club
Monday 8:00 PM 147.225 Colorado QRP Club Information Net
  8:30 PM 146.940 Rocky Mountain Radio League
Tuesday 7:00 PM 146.940 Colorado Astronomy Net
  8:00 PM 147.225 Edge of Space Sciences Net
Wednesday 8:00 PM 147.225 Colorado AMSAT  Net
Thursday 8:00 PM 145.310 Colorado Connection Information Net
       
Friday      
Saturday