KRVF Ruby Valley Field night times
Twin Bridges, MT · FAA RVF
Night of Nov 6 to Nov 7MST
Position lights
§ 91.2095:09 PMto7:17 AM
Sunset to sunrise. Lights on.
0009Z to 1417Z
Night logging
§ 1.15:40 PMto6:46 AM
Civil twilight. Log it as night.
0040Z to 1346Z
Night currency
§ 61.57(b)6:09 PMto6:17 AM
One hour after sunset. Landings count.
0109Z to 1317Z
Evenings at KRVF
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1MST | 5:16 PM | 5:47 PM | 6:16 PM |
| Nov 15MST | 4:59 PM | 5:31 PM | 5:59 PM |
| Dec 1MST | 4:47 PM | 5:21 PM | 5:47 PM |
| Dec 15MST | 4:46 PM | 5:20 PM | 5:46 PM |
| Jan 1MST | 4:56 PM | 5:30 PM | 5:56 PM |
| Jan 15MST | 5:12 PM | 5:45 PM | 6:12 PM |
| Feb 1MST | 5:36 PM | 6:07 PM | 6:36 PM |
| Feb 15MST | 5:56 PM | 6:27 PM | 6:56 PM |
| Mar 1MST | 6:16 PM | 6:46 PM | 7:16 PM |
| Mar 15MDT | 7:35 PM | 8:05 PM | 8:35 PM |
| Apr 1MDT | 7:57 PM | 8:27 PM | 8:57 PM |
| Apr 15MDT | 8:15 PM | 8:47 PM | 9:15 PM |
| May 1MDT | 8:36 PM | 9:09 PM | 9:36 PM |
| May 15MDT | 8:53 PM | 9:28 PM | 9:53 PM |
| Jun 1MDT | 9:11 PM | 9:48 PM | 10:11 PM |
| Jun 15MDT | 9:20 PM | 9:58 PM | 10:20 PM |
| Jul 1MDT | 9:22 PM | 9:59 PM | 10:22 PM |
| Jul 15MDT | 9:15 PM | 9:51 PM | 10:15 PM |
| Aug 1MDT | 8:57 PM | 9:31 PM | 9:57 PM |
| Aug 15MDT | 8:37 PM | 9:09 PM | 9:37 PM |
| Sep 1MDT | 8:07 PM | 8:38 PM | 9:07 PM |
| Sep 15MDT | 7:40 PM | 8:10 PM | 8:40 PM |
| Oct 1MDT | 7:10 PM | 7:39 PM | 8:10 PM |
| Oct 15MDT | 6:44 PM | 7:14 PM | 7:44 PM |
Mornings at KRVF
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1MST | 6:09 AM | 6:38 AM | 7:09 AM |
| Nov 15MST | 6:29 AM | 6:56 AM | 7:29 AM |
| Dec 1MST | 6:49 AM | 7:16 AM | 7:49 AM |
| Dec 15MST | 7:03 AM | 7:28 AM | 8:03 AM |
| Jan 1MST | 7:09 AM | 7:35 AM | 8:09 AM |
| Jan 15MST | 7:06 AM | 7:32 AM | 8:06 AM |
| Feb 1MST | 6:50 AM | 7:19 AM | 7:50 AM |
| Feb 15MST | 6:31 AM | 7:01 AM | 7:31 AM |
| Mar 1MST | 6:08 AM | 6:38 AM | 7:08 AM |
| Mar 15MDT | 6:42 AM | 7:12 AM | 7:42 AM |
| Apr 1MDT | 6:10 AM | 6:40 AM | 7:10 AM |
| Apr 15MDT | 5:44 AM | 6:13 AM | 6:44 AM |
| May 1MDT | 5:17 AM | 5:45 AM | 6:17 AM |
| May 15MDT | 4:59 AM | 5:24 AM | 5:59 AM |
| Jun 1MDT | 4:44 AM | 5:07 AM | 5:44 AM |
| Jun 15MDT | 4:40 AM | 5:02 AM | 5:40 AM |
| Jul 1MDT | 4:44 AM | 5:07 AM | 5:44 AM |
| Jul 15MDT | 4:55 AM | 5:18 AM | 5:55 AM |
| Aug 1MDT | 5:13 AM | 5:39 AM | 6:13 AM |
| Aug 15MDT | 5:30 AM | 5:57 AM | 6:30 AM |
| Sep 1MDT | 5:50 AM | 6:20 AM | 6:50 AM |
| Sep 15MDT | 6:08 AM | 6:38 AM | 7:08 AM |
| Oct 1MDT | 6:27 AM | 6:58 AM | 7:27 AM |
| Oct 15MDT | 6:45 AM | 7:16 AM | 7:45 AM |
Lights and runways
As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.
ACTVT PAPI RWY 17 & 35; MIRL RWY 17/35 - CTAF.
Runway 07/25
2,866 × 100 ft · Turf
Runway 17/35
6,000 × 75 ft · Asphalt
Frequencies
Night at KRVF, in short
When can I log night time at KRVF?
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 5:40 PM to 6:46 AM MST.
When do landings at KRVF 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 6:09 PM to 6:17 AM MST.
When are position lights required at KRVF?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 5:09 PM to 7:17 AM MST.
Nearby airports
- KDLN Dillon Dillon, MT · 20 nm
- KBTM Bert Mooney Butte, MT · 26 nm
- KEKS Ennis Big Sky Ennis, MT · 32 nm
- 02T Wise River Wise River, MT · 32 nm
- 9S5 Three Forks Three Forks, MT · 37 nm
- 3U9 Boulder Boulder, MT · 41 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.