LogNight

KGTF Great Falls International night times

Great Falls, MT · FAA GTF

Night of Nov 6 to Nov 7MST

Position lights

§ 91.209

5:01 PMto7:19 AM

Sunset to sunrise. Lights on.

0001Z to 1419Z

Night logging

§ 1.1

5:33 PMto6:46 AM

Civil twilight. Log it as night.

0033Z to 1346Z

Night currency

§ 61.57(b)

6:01 PMto6:19 AM

One hour after sunset. Landings count.

0101Z to 1319Z

Other dates, moon, and night hours

Evenings at KGTF

When each night begins, through the year. Local time.

Date SunsetLights onCivil twilight endsLog night1 hr after sunsetLandings count
Nov 1MST 5:08 PM5:40 PM6:08 PM
Nov 15MST 4:49 PM5:23 PM5:49 PM
Dec 1MST 4:36 PM5:12 PM5:36 PM
Dec 15MST 4:35 PM5:11 PM5:35 PM
Jan 1MST 4:45 PM5:21 PM5:45 PM
Jan 15MST 5:02 PM5:36 PM6:02 PM
Feb 1MST 5:27 PM6:00 PM6:27 PM
Feb 15MST 5:49 PM6:21 PM6:49 PM
Mar 1MST 6:10 PM6:41 PM7:10 PM
Mar 15MDT 7:31 PM8:02 PM8:31 PM
Apr 1MDT 7:55 PM8:26 PM8:55 PM
Apr 15MDT 8:15 PM8:47 PM9:15 PM
May 1MDT 8:37 PM9:12 PM9:37 PM
May 15MDT 8:56 PM9:33 PM9:56 PM
Jun 1MDT 9:15 PM9:54 PM10:15 PM
Jun 15MDT 9:24 PM10:05 PM10:24 PM
Jul 1MDT 9:26 PM10:06 PM10:26 PM
Jul 15MDT 9:19 PM9:57 PM10:19 PM
Aug 1MDT 9:00 PM9:35 PM10:00 PM
Aug 15MDT 8:38 PM9:11 PM9:38 PM
Sep 1MDT 8:06 PM8:38 PM9:06 PM
Sep 15MDT 7:38 PM8:09 PM8:38 PM
Oct 1MDT 7:05 PM7:36 PM8:05 PM
Oct 15MDT 6:38 PM7:09 PM7:38 PM

Mornings at KGTF

When each night ends. Local time.

Date 1 hr before sunriseLandings stop countingCivil twilight beginsNight logging endsSunriseLights off
Nov 1MST 6:10 AM6:37 AM7:10 AM
Nov 15MST 6:31 AM6:57 AM7:31 AM
Dec 1MST 6:52 AM7:17 AM7:52 AM
Dec 15MST 7:07 AM7:31 AM8:07 AM
Jan 1MST 7:13 AM7:38 AM8:13 AM
Jan 15MST 7:09 AM7:34 AM8:09 AM
Feb 1MST 6:52 AM7:19 AM7:52 AM
Feb 15MST 6:31 AM6:59 AM7:31 AM
Mar 1MST 6:06 AM6:35 AM7:06 AM
Mar 15MDT 6:39 AM7:08 AM7:39 AM
Apr 1MDT 6:04 AM6:33 AM7:04 AM
Apr 15MDT 5:37 AM6:05 AM6:37 AM
May 1MDT 5:09 AM5:35 AM6:09 AM
May 15MDT 4:49 AM5:12 AM5:49 AM
Jun 1MDT 4:32 AM4:53 AM5:32 AM
Jun 15MDT 4:28 AM4:47 AM5:28 AM
Jul 1MDT 4:32 AM4:52 AM5:32 AM
Jul 15MDT 4:44 AM5:05 AM5:44 AM
Aug 1MDT 5:03 AM5:27 AM6:03 AM
Aug 15MDT 5:22 AM5:48 AM6:22 AM
Sep 1MDT 5:44 AM6:12 AM6:44 AM
Sep 15MDT 6:03 AM6:32 AM7:03 AM
Oct 1MDT 6:24 AM6:54 AM7:24 AM
Oct 15MDT 6:44 AM7:13 AM7:44 AM

Lights and runways

As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.

Field elevation 3,680 ft MSL
Airport lights See remarks below
Beacon White and green, sunset to sunrise
Wind indicator Not lighted

REIL RWY 21 OPR CONSLY WHEN RWY LGTS ARE ON. RWY LGTS CTLD BY TWR.

Runway 03/21

10,502 × 150 ft · Asphalt

Edge lights High intensity (HIRL)
03 ALSF2 · 4-light PAPI, left · Centerline · Touchdown zone
21 4-light PAPI, right · REIL · Centerline

PAPI UNUSBL BYD 9 DEGS RIGHT OF CNTRLN.

Runway 17/35

6,030 × 150 ft · Asphalt

Edge lights Medium intensity (MIRL)
17 4-light PAPI, left
35 4-light PAPI, left

Frequencies

Tower hours 24 hours
Tower 118.7
Ground 121.7
ATIS 126.6
UNICOM 122.95
ASOS 126.6

Night at KGTF, in short

When can I log night time at KGTF?

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 5:33 PM to 6:46 AM MST.

When do landings at KGTF 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 6:01 PM to 6:19 AM MST.

When are position lights required at KGTF?

From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 5:01 PM to 7:19 AM MST.

Nearby airports

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.