Mariposa-Yosemite traffic pattern

Pattern altitude at Mariposa-Yosemite (MPI · KMPI) is 3,300 ft MSL (≈1,000 AGL) by the standard convention — none is published for this field, and 08 is charted right traffic. · Open on the map

All of Mariposa-Yosemite — 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 KMPI reports it.

RWY 26LEFT traffic

Heading: 265° mag · 280° true
Dimensions: 3,305 × 60 ft
TPA: 3,300 ft MSL (≈1,000 AGL) · standard
Surface: Asphalt
Lights: 2-light PAPI (left) (4.5°)
CTAF: 122.7

Enter the left downwind (heading 085°) on the 45° at 3,300 ft MSL (≈1,000 AGL).

More details — RWY 26

Threshold elev: 2,223 ft
Markings: nonprecision
Approach obstacle: Tree, 29 ft, 762 ft from threshold, 83 ft L of centerline — 20:1 slope to clear
Threshold crossing height: 40 ft
TDZ elevation: 2,251 ft

Condition: Poor. Edge lights: Med. Weight bearing: Single wheel 12k.

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
08	Right traffic	085° mag	3,300 ft MSL (≈1,000 AGL)
26	Left traffic	265° mag	3,300 ft MSL (≈1,000 AGL)

No pattern altitude is published for KMPI; 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 KMPI

Mariposa-Yosemite 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: 08. 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 KMPI?

Mariposa-Yosemite 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 3,300 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 KMPI have right traffic?

Yes, on one runway end: 08. Every other end at Mariposa-Yosemite is standard left traffic.

What frequency is the pattern on at KMPI?

Mariposa-Yosemite 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 KMPI

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.