Airport information
- FAA LID
- SD25
- Coordinates
- 44.2186, -103.2514
- Elevation
- 3,159 ft MSL
- Sectional chart
- TWIN CITIES
- Airport use
- Private
- Control tower
- No
- ARTCC
- DENVER (ZDV)
- Flight service (FSS)
- HURON
- Attendance
- UNATNDD
- Segmented circle
- No
- Activated
- 2023/11
- Distance from city
- 6 E
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-21
| Event | Local (MDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 04:33 AM | 10:33Z |
| Sunrise | 05:09 AM | 11:09Z |
| Sunset | 08:40 PM | 02:40Z |
| Evening civil twilight Loggable night begins | 09:17 PM | 03:17Z |
Plan a flight from SD25
Night operations
- Pilot-controlled lighting
- Usually keyed on CTAF 122.9 — confirm the click sequence in the Chart Supplement
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.
Traffic pattern
- Landing
- Rwy 13
- Pattern
- left (turns left)
- TPA
- 4,200 ft MSL (≈1,000 AGL)
- CTAF
- 122.9
Enter the left downwind for Rwy 13 at 4,200 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 13/31
5,000 ft · Asphalt- Heading
- 135° true
- Markings
- basic
- Traffic pattern
- Left
- Heading
- 315° true
- Markings
- basic
- Traffic pattern
- Left
Headings shown are true (magnetic variation unavailable).
| Runway | Length | Your margin |
|---|---|---|
| 13/31 | 5,000 ft |
Communication frequencies
| Service | Frequency | Notes |
|---|---|---|
| CTAF | 122.9 |
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
| NavAid | Type | Freq | Radial / Dist magnetic |
|---|---|---|---|
| RCA · Ellsworth | TACAN | 108.80 | r296° / 8 NM |
| RAP · Rapid City | VORTAC | 112.30 | r312° / 17.9 NM |
VFR sectional
No published instrument procedures or Chart Supplement for SD25. VFR sectional link above.
Ownership & management
Remarks FAA
- RWY 13/31 UNDER CONST.
Nearby airports
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open SD25 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.
About SD25
Infinity Landing Airport (SD25) is an airport in Piedmont, SD, at 3,159 ft MSL. It has 1 runway, the longest 5,000 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for SD25, refreshed from the Aviation Weather Center and FAA NASR.
Does SD25 have a control tower?
No. Infinity Landing Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at SD25?
Infinity Landing Airport has 1 runway; the longest is 5,000 ft. See the Runways tab for headings, surface, and lighting.
Where is SD25?
Infinity Landing Airport is in Piedmont, SD, at an elevation of 3,159 ft MSL. Coordinates: 44.2186, -103.2514.
Fly out of SD25 often?
Save SD25 as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.