runwayinuse

70TT Big Bend Valley

36
PROBABLE 60%

Runway 36 — wind slightly favors it, low confidence

Based mostly on wind; no traffic or ATIS to confirm. No D-ATIS feed here — a voice ATIS/AWOS may exist; check the frequency. No ADS-B traffic data available.

certainty: 60% evidence: NONE no tower now

N 36 18

Wind 310° true at 4 kt · VFR · 45 min old · from KT89 (21.4 nm away)

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36 60% 1515 ft · 3 kt head, 3 kt x-left
18 40% 1515 ft · 3 kt TAIL, 3 kt x-right
Why — evidence behind this answer

Runway 36

Runway 18

Sources consulted

sourcestatus agenote
D_ATISUNAVAILABLE No D-ATIS at this field
METAROK 45 min Nearest station KT89 (21.4 nm away)
ADSBUNAVAILABLE No ADS-B track history here yet
NOTAMOK
CIFPNOT_CONFIGURED Instrument procedures: phase 4

Recent operations

No operations observed in the last hour. (No ADS-B track history here yet)

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70TT field & runways

Big Bend Valley, Terlingua, Texas. Field elevation 3344 ft. Non-towered (NON-ATCT). Private use.

The FAA's variation of record is the number this field was surveyed against; the second is where north points now, from WMM2025. It is moving 0.075°/year west — about 1° every 13 years — which is why runway numbers eventually stop matching their pavement.

Runway data from the FAA NASR 01 Oct 2026 cycle. Where NASR locates both thresholds, the true heading is the bearing between them rather than NASR's whole-degree alignment. Magnetic is that heading against today's declination from WMM2025, not the field's variation of record — so it can differ from the chart by the gap between the two shown above. The number painted on the runway is the one ATC uses.
RunwayTrueMagnetic Number LengthSurfacePattern Notes
18 180.0° 174.0° runway 17 by the rule today · 6.0° past 1,515 ft DIRT
36 0.0° 354.0° runway 35 by the rule today · 6.0° past 1,515 ft DIRT

Generated 09:14:49Z · auto-refreshes · JSON