U81 Cold Meadows USFS night times
Cold Meadows Guard Station, ID
Night of Nov 6 to Nov 7MST
Position lights
§ 91.2095:20 PMto7:27 AM
Sunset to sunrise. Lights on.
0020Z to 1427Z
Night logging
§ 1.15:51 PMto6:56 AM
Civil twilight. Log it as night.
0051Z to 1356Z
Night currency
§ 61.57(b)6:20 PMto6:27 AM
One hour after sunset. Landings count.
0120Z to 1327Z
Evenings at U81
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1MST | 5:27 PM | 5:58 PM | 6:27 PM |
| Nov 15MST | 5:10 PM | 5:42 PM | 6:10 PM |
| Dec 1MST | 4:59 PM | 5:32 PM | 5:59 PM |
| Dec 15MST | 4:58 PM | 5:32 PM | 5:58 PM |
| Jan 1MST | 5:08 PM | 5:42 PM | 6:08 PM |
| Jan 15MST | 5:23 PM | 5:56 PM | 6:23 PM |
| Feb 1MST | 5:47 PM | 6:18 PM | 6:47 PM |
| Feb 15MST | 6:07 PM | 6:38 PM | 7:07 PM |
| Mar 1MST | 6:27 PM | 6:57 PM | 7:27 PM |
| Mar 15MDT | 7:46 PM | 8:15 PM | 8:46 PM |
| Apr 1MDT | 8:08 PM | 8:38 PM | 9:08 PM |
| Apr 15MDT | 8:26 PM | 8:57 PM | 9:26 PM |
| May 1MDT | 8:46 PM | 9:19 PM | 9:46 PM |
| May 15MDT | 9:03 PM | 9:38 PM | 10:03 PM |
| Jun 1MDT | 9:20 PM | 9:57 PM | 10:20 PM |
| Jun 15MDT | 9:30 PM | 10:07 PM | 10:30 PM |
| Jul 1MDT | 9:31 PM | 10:09 PM | 10:31 PM |
| Jul 15MDT | 9:25 PM | 10:01 PM | 10:25 PM |
| Aug 1MDT | 9:07 PM | 9:41 PM | 10:07 PM |
| Aug 15MDT | 8:47 PM | 9:19 PM | 9:47 PM |
| Sep 1MDT | 8:17 PM | 8:48 PM | 9:17 PM |
| Sep 15MDT | 7:51 PM | 8:20 PM | 8:51 PM |
| Oct 1MDT | 7:20 PM | 7:50 PM | 8:20 PM |
| Oct 15MDT | 6:55 PM | 7:24 PM | 7:55 PM |
Mornings at U81
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1MST | 6:19 AM | 6:48 AM | 7:19 AM |
| Nov 15MST | 6:39 AM | 7:07 AM | 7:39 AM |
| Dec 1MST | 6:59 AM | 7:26 AM | 7:59 AM |
| Dec 15MST | 7:12 AM | 7:38 AM | 8:12 AM |
| Jan 1MST | 7:19 AM | 7:45 AM | 8:19 AM |
| Jan 15MST | 7:15 AM | 7:42 AM | 8:15 AM |
| Feb 1MST | 7:00 AM | 7:29 AM | 8:00 AM |
| Feb 15MST | 6:41 AM | 7:11 AM | 7:41 AM |
| Mar 1MST | 6:18 AM | 6:48 AM | 7:18 AM |
| Mar 15MDT | 6:52 AM | 7:23 AM | 7:52 AM |
| Apr 1MDT | 6:20 AM | 6:51 AM | 7:20 AM |
| Apr 15MDT | 5:55 AM | 6:24 AM | 6:55 AM |
| May 1MDT | 5:29 AM | 5:56 AM | 6:29 AM |
| May 15MDT | 5:10 AM | 5:36 AM | 6:10 AM |
| Jun 1MDT | 4:55 AM | 5:19 AM | 5:55 AM |
| Jun 15MDT | 4:51 AM | 5:14 AM | 5:51 AM |
| Jul 1MDT | 4:56 AM | 5:18 AM | 5:56 AM |
| Jul 15MDT | 5:06 AM | 5:30 AM | 6:06 AM |
| Aug 1MDT | 5:24 AM | 5:50 AM | 6:24 AM |
| Aug 15MDT | 5:41 AM | 6:09 AM | 6:41 AM |
| Sep 1MDT | 6:01 AM | 6:31 AM | 7:01 AM |
| Sep 15MDT | 6:18 AM | 6:49 AM | 7:18 AM |
| Oct 1MDT | 6:38 AM | 7:08 AM | 7:38 AM |
| Oct 15MDT | 6:56 AM | 7:26 AM | 7:56 AM |
Lights and runways
As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.
Runway 16/34
4,550 × 90 ft · Turf
Frequencies
Night at U81, in short
When can I log night time at U81?
From the end of evening civil twilight to the beginning of morning civil twilight, when the sun is 6° below the horizon (14 CFR 1.1). On the night of Nov 6, 2026, that was 5:51 PM to 6:56 AM MST.
When do landings at U81 count for night currency?
From one hour after sunset to one hour before sunrise. To carry passengers at night you need 3 takeoffs and 3 full-stop landings in that period within the last 90 days (14 CFR 61.57(b)). On the night of Nov 6, 2026, that was 6:20 PM to 6:27 AM MST.
When are position lights required at U81?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 5:20 PM to 7:27 AM MST.
Nearby airports
- I08 Cabin Creek USFS Big Creek Ranger Station, ID · 9 nm
- U79 Chamberlain USFS Chamberlain Guard Station, ID · 12 nm
- 85U Soldier Bar USFS Soldier Bar, ID · 13 nm
- U60 Big Creek Big Creek, ID · 19 nm
- U54 Bernard USFS Bernard, ID · 21 nm
- 4D2 Hoodoo Meadows Salmon, ID · 22 nm
Times are worked out from the sun's position for a sea-level horizon, rounded to the minute. Airport data from the FAA NASR cycle of Oct 29, 2026.