KRIW Central Wyoming Regional night times
Riverton, WY · FAA RIW
Night of Nov 6 to Nov 7MST
Position lights
§ 91.2094:59 PMto6:56 AM
Sunset to sunrise. Lights on.
2359Z to 1356Z
Night logging
§ 1.15:29 PMto6:26 AM
Civil twilight. Log it as night.
0029Z to 1326Z
Night currency
§ 61.57(b)5:59 PMto5:56 AM
One hour after sunset. Landings count.
0059Z to 1256Z
Evenings at KRIW
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1MST | 5:06 PM | 5:35 PM | 6:06 PM |
| Nov 15MST | 4:50 PM | 5:21 PM | 5:50 PM |
| Dec 1MST | 4:40 PM | 5:12 PM | 5:40 PM |
| Dec 15MST | 4:40 PM | 5:12 PM | 5:40 PM |
| Jan 1MST | 4:50 PM | 5:22 PM | 5:50 PM |
| Jan 15MST | 5:04 PM | 5:36 PM | 6:04 PM |
| Feb 1MST | 5:26 PM | 5:56 PM | 6:26 PM |
| Feb 15MST | 5:45 PM | 6:14 PM | 6:45 PM |
| Mar 1MST | 6:03 PM | 6:32 PM | 7:03 PM |
| Mar 15MDT | 7:20 PM | 7:48 PM | 8:20 PM |
| Apr 1MDT | 7:40 PM | 8:09 PM | 8:40 PM |
| Apr 15MDT | 7:56 PM | 8:26 PM | 8:56 PM |
| May 1MDT | 8:15 PM | 8:46 PM | 9:15 PM |
| May 15MDT | 8:31 PM | 9:03 PM | 9:31 PM |
| Jun 1MDT | 8:47 PM | 9:21 PM | 9:47 PM |
| Jun 15MDT | 8:55 PM | 9:30 PM | 9:55 PM |
| Jul 1MDT | 8:57 PM | 9:32 PM | 9:57 PM |
| Jul 15MDT | 8:51 PM | 9:25 PM | 9:51 PM |
| Aug 1MDT | 8:35 PM | 9:07 PM | 9:35 PM |
| Aug 15MDT | 8:16 PM | 8:47 PM | 9:16 PM |
| Sep 1MDT | 7:49 PM | 8:18 PM | 8:49 PM |
| Sep 15MDT | 7:24 PM | 7:52 PM | 8:24 PM |
| Oct 1MDT | 6:55 PM | 7:23 PM | 7:55 PM |
| Oct 15MDT | 6:31 PM | 7:00 PM | 7:31 PM |
Mornings at KRIW
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1MST | 5:49 AM | 6:19 AM | 6:49 AM |
| Nov 15MST | 6:07 AM | 6:36 AM | 7:07 AM |
| Dec 1MST | 6:26 AM | 6:54 AM | 7:26 AM |
| Dec 15MST | 6:39 AM | 7:06 AM | 7:39 AM |
| Jan 1MST | 6:45 AM | 7:13 AM | 7:45 AM |
| Jan 15MST | 6:43 AM | 7:11 AM | 7:43 AM |
| Feb 1MST | 6:29 AM | 6:59 AM | 7:29 AM |
| Feb 15MST | 6:12 AM | 6:42 AM | 7:12 AM |
| Mar 1MST | 5:50 AM | 6:21 AM | 6:50 AM |
| Mar 15MDT | 6:26 AM | 6:58 AM | 7:26 AM |
| Apr 1MDT | 5:56 AM | 6:27 AM | 6:56 AM |
| Apr 15MDT | 5:32 AM | 6:03 AM | 6:32 AM |
| May 1MDT | 5:08 AM | 5:37 AM | 6:08 AM |
| May 15MDT | 4:51 AM | 5:18 AM | 5:51 AM |
| Jun 1MDT | 4:37 AM | 5:03 AM | 5:37 AM |
| Jun 15MDT | 4:34 AM | 4:59 AM | 5:34 AM |
| Jul 1MDT | 4:38 AM | 5:03 AM | 5:38 AM |
| Jul 15MDT | 4:48 AM | 5:14 AM | 5:48 AM |
| Aug 1MDT | 5:04 AM | 5:32 AM | 6:04 AM |
| Aug 15MDT | 5:20 AM | 5:49 AM | 6:20 AM |
| Sep 1MDT | 5:38 AM | 6:09 AM | 6:38 AM |
| Sep 15MDT | 5:53 AM | 6:25 AM | 6:53 AM |
| Oct 1MDT | 6:11 AM | 6:43 AM | 7:11 AM |
| Oct 15MDT | 6:27 AM | 6:59 AM | 7:27 AM |
Lights and runways
As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.
CONDS NOT MONITORED AT NGT AFT THE LAST ACR ARR TIL 0500L. SEE NOTAMS FOR THE MOST UP-TO-DATE CONDS AND UPDTS.
ACTVT HIRL RY 10/28; MIRL RY 01/19; REIL RY 01 & RY 19; AND REIL RY 10; MALSR RY 28 - CTAF. PAPI RY 01, RY 19, RY 10 & RY 28 OPER 24 HRS.
Runway 01/19
4,800 × 75 ft · Asphalt
Runway 10/28
8,204 × 150 ft · Asphalt
Frequencies
Night at KRIW, in short
When can I log night time at KRIW?
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 5:29 PM to 6:26 AM MST.
When do landings at KRIW 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 5:59 PM to 5:56 AM MST.
When are position lights required at KRIW?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 4:59 PM to 6:56 AM MST.
Nearby airports
- 49U Shoshoni Municipal Shoshoni, WY · 19 nm
- KLND Hunt Field Lander, WY · 19 nm
- KHSG Hot Springs County Thermopolis, WY · 39 nm
- KWRL Worland Municipal Worland, WY · 58 nm
- KDUB Dubois Municipal Dubois, WY · 61 nm
- KPNA Ralph Wenz Field Pinedale, WY · 62 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.