William B Bolton traffic pattern

Pattern altitude at William B Bolton (Y87) is 1,900 ft MSL (≈1,000 AGL) by the standard convention — none is published for this field, and every runway end is standard left traffic. · Open on the map

All of William B Bolton — 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 Y87 reports it.

RWY 17LEFT traffic

Heading: 167° mag · 163° true
Dimensions: 2,600 × 50 ft
TPA: 1,900 ft MSL (≈1,000 AGL) · standard
Surface: Asphalt
Displaced thr: 200 ft
CTAF: 122.9

Enter the left downwind (heading 347°) on the 45° at 1,900 ft MSL (≈1,000 AGL).

More details — RWY 17

Threshold elev: 937 ft
Markings: basic
Approach obstacle: Trees, 10 ft, 200 ft from threshold, 125 ft L/R of centerline
Declared TORA/TODA/ASDA/LDA: — / — / — / 2,400 ft

Condition: Fair. Edge lights: Low. Weight bearing: Single wheel 12.5k.

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

Pattern direction by runway

Runway	Pattern	Heading	Pattern altitude
17	Left traffic	167° mag	1,900 ft MSL (≈1,000 AGL)
35	Left traffic	347° mag	1,900 ft MSL (≈1,000 AGL)
09	Left traffic	088° mag	1,900 ft MSL (≈1,000 AGL)
27	Left traffic	268° mag	1,900 ft MSL (≈1,000 AGL)

No pattern altitude is published for Y87; 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 Y87

William B Bolton is non towered, so the pattern is self announced on CTAF 122.9. AC 90-66B asks for a report on entry and on each leg, and for the standard 45° entry to downwind at pattern altitude.

All ends are left traffic, which is the FAR 91.126 default — turns to the left unless the field charts otherwise. The full entry procedure is here →

Frequently asked

What is the traffic pattern altitude at Y87?

William B Bolton 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 1,900 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 Y87 have right traffic?

No. All 4 runway ends at William B Bolton use standard left traffic, so no right pattern is charted here.

What frequency is the pattern on at Y87?

William B Bolton is non towered, so pattern position reports go on the CTAF, 122.9. AC 90-66B asks for self announcing on entry and on each leg.

More about Y87

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.

Something here wrong or out of date? Report a data problem.