Mt. Umunhum

• Wind directionSSW (200°) → WSW (250°)
• Ideal speed8–15 mph
• Upper limits≤ 18 mph base · gusts ≤ 20

No club/USHPA site guide with explicit numbers was found; Mt. Umunhum (Sierra Azul Open Space Preserve, Santa Cruz Mountains, ~3346 ft) is a highly restricted, advanced-only flying area with very little published flying data. Orientation hint gives two working facings: a SW aspect (primary; ideal ~200-250 deg) and a NE aspect (secondary; roughly 25-70 deg). SW launch generally aligns with the typical afternoon WSW-to-SW marine/seabreeze flow that builds in this part of the Bay Area, which is why SW is treated as the primary arc here; the NE arc would be a morning/offshore or post-frontal option. Pilot chatter notes 'very common convergence running south,' suggesting good XC potential but also shifting, mixing flow that demands experience. Treat as advanced (H4/P4-level), permit/access-restricted terrain with likely rotor and turbulence behind the summit and over the rugged lee terrain; best flown in steady, light-to-moderate flow rather than strong wind. Speed and gust figures are conservative inferences, NOT measured site limits. Verify launch location, legality/access, and current conditions with the local Wings of Rogallo chapter and on-site pilots before flying. NE and SW arcs are roughly opposite, so on any given day only one facing will be working.