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Flagstaff & Verde Valley dump stations
For the I-17 climb, Dead Horse Ranch State Park (Cottonwood) is the clearest official non-camper dump ($20). In Flagstaff proper, Black Bart’s is commonly used for dump-only (fee reports conflict — call). Flagstaff KOA’s public dump-only fee was not verified on the KOA page.
Call before you haul. Listings below include verification labels. Research date: 2026-11-05 America/Phoenix.
Dead Horse Ranch State Park — dump
Dead Horse Ranch State Park, Cottonwood, AZ (ranger station at park entrance)
Public / pay dump
Fee verified
FeeFree for registered campers; $20 for non-campers
WaterUnknown for dump-only visitors — ask at ranger station
HoursPark open year-round; gates close at dark; ranger station/store ~8 AM–4:30 PM
Last checked2026-11-05 MST
Notes: Strong I-17 / Verde Valley option between Phoenix and Flagstaff. Owl Road / cabin restroom closures may be posted — check park alerts.
Fee detail: Official Arizona State Parks facility page: dump available to registered campers; non-campers may use it for a $20 fee. Park entrance fees are separate.
Water detail: See summary above.
Hours detail: Seasonal gate hours may apply. Confirm dump-only access timing when the entrance is staffed.
Sources: Arizona State Parks — Dead Horse Ranch facility info
ID: dead-horse-ranch-cottonwood · City: Cottonwood · Access: public_pay
Black Bart's RV Park — dump
2760 E Butler Ave, Flagstaff, AZ 86004 · (928) 774-1912
Public / pay dump
Traveler-reported fee
FeeDump-only fee reported around $8–$10 — call to confirm
WaterCamperFAQs lists potable and non-potable — still confirm
HoursOffice often cited ~9 AM–6 PM (extended in summer) — call first
Last checked2026-11-05 MST
Notes: Near I-40 / Butler Ave. Useful Flagstaff dump-only stop if they still accept non-guests.
Fee detail: CamperFAQs lists $8 dump-only; a Campendium traveler review described paying $10 to dump. Conflicting secondary reports — call the park.
Water detail: See summary above.
Hours detail: Hours from Campendium description text; not independently confirmed on an official dump tariff page.
Sources: CamperFAQs Flagstaff dump list Campendium Black Bart's listing/reviews
ID: black-barts-flagstaff · City: Flagstaff · Access: public_pay
Flagstaff KOA Holiday
5803 N US Highway 89, Flagstaff, AZ 86004 · (928) 526-9926
Call to confirm
Fee unknown
FeePublic dump-only fee not verified on KOA page — call
WaterUnknown for dump-only visitors
HoursOffice hours from KOA schema: Sun–Thu 8 AM–6 PM; Fri–Sat 8 AM–8 PM
Last checked2026-11-05 MST
Notes: North Flagstaff / Hwy 89. Treat public dump access as unverified until you call.
Fee detail: Official KOA page confirms address/phone/office hours. CamperFAQs historically lists dump-only around $16 for non-guests, but we did not verify that dollar amount on the KOA site. Call before you haul.
Water detail: See summary above.
Hours detail: Dump-only availability outside office hours is unverified.
Sources: Flagstaff KOA Holiday official page CamperFAQs Flagstaff dump list (secondary fee claim)
ID: flagstaff-koa · City: Flagstaff · Access: public_pay_unverified