Black Hills Airport-Clyde Ice Field traffic pattern

Pattern altitude at Black Hills Airport-Clyde Ice Field (SPF · KSPF) is 4,900 ft MSL (≈1,000 AGL) by the standard convention — none is published for this field, and 13 is charted right traffic.

All of Black Hills Airport-Clyde Ice Field — runways, frequencies, charts and live weather

Pattern diagram

Drawn to scale from the FAA NASR runway alignments and the per end right traffic flags — pick a runway to see its pattern. Live wind picks the favored runway when KSPF reports it.

RWY 13RIGHT trafficRP · charted

Heading: 124° mag · 135° true
Dimensions: 6,401 × 75 ft
TPA: 4,900 ft MSL (≈1,000 AGL) · standard
Surface: Asphalt
Lights: 4-light PAPI (left) (3°)
CTAF: 122.7

Enter the right downwind (heading 304°) on the 45° at 4,900 ft MSL (≈1,000 AGL).

More details — RWY 13

Threshold elev: 3,884 ft
Markings: nonprecision
Approach obstacle: Hill, 98 ft, 2,160 ft from threshold, 380 ft L of centerline — 20:1 slope to clear
Threshold crossing height: 50 ft
TDZ elevation: 3,884 ft

Condition: Good. Edge lights: Med. Weight bearing: Single wheel 33k, Double wheel 45k.

Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates

Pattern direction by runway

Runway	Pattern	Heading	Pattern altitude
04	Left traffic	034° mag	4,900 ft MSL (≈1,000 AGL)
22	Left traffic	214° mag	4,900 ft MSL (≈1,000 AGL)
08	Left traffic	081° mag	4,900 ft MSL (≈1,000 AGL)
26	Left traffic	261° mag	4,900 ft MSL (≈1,000 AGL)
13	Right traffic	124° mag	4,900 ft MSL (≈1,000 AGL)
31	Left traffic	304° mag	4,900 ft MSL (≈1,000 AGL)

No pattern altitude is published for KSPF; the figure above is the AC 90-66B 1,000 ft AGL convention for propeller aircraft, rounded to the field. Turbine aircraft normally fly 1,500 ft AGL. Headings are the runway alignment; downwind is the reciprocal.

Flying the pattern at KSPF

Black Hills Airport-Clyde Ice Field is non towered, so the pattern is self announced on CTAF 122.7. AC 90-66B asks for a report on entry and on each leg, and for the standard 45° entry to downwind at pattern altitude.

Watch the right traffic ends here: 13. A right pattern at a field where the other end is left is the single most common place to end up pointing at opposing traffic. The full entry procedure is here →

Frequently asked

What is the traffic pattern altitude at KSPF?

Black Hills Airport-Clyde Ice Field has no traffic pattern altitude published in the FAA NASR data. The AC 90-66B convention for propeller aircraft is 1,000 ft AGL, which works out to roughly 4,900 ft MSL (≈1,000 AGL) here — but confirm it against the Chart Supplement before you fly, since a field can have a non standard pattern altitude that NASR does not carry.

Does KSPF have right traffic?

Yes, on one runway end: 13. Every other end at Black Hills Airport-Clyde Ice Field is standard left traffic.

What frequency is the pattern on at KSPF?

Black Hills Airport-Clyde Ice Field is non towered, so pattern position reports go on the CTAF, 122.7. AC 90-66B asks for self announcing on entry and on each leg.

More about KSPF

Pattern direction and alignment are drawn from the FAA NASR (28-day cycle); the diagram is generated, not an FAA chart. Pattern altitude is shown as published where NASR carries one, otherwise as the AC 90-66B 1,000 ft AGL convention. For planning and education only; always verify against the Chart Supplement.