WeighHerePublic scales for U-Hauls, RVs, horse trailers, and PPM loads
Call ahead. Hours, fees, and walk-up rules change. WeighHere is not CDFA, CAT, or CHP.

Ontario · I-10 West · Inland Empire · listings checked 16 Sep 2026

Public scales on I-10 through Ontario / Mira Loma / Colton

CDFA’s San Bernardino grid (c=36) loaded this compile and names TA Ontario and Petro Ontario on Guasti Rd. Four CAT Scales verified on TA/Petro and Pilot Flying J own location pages: TA #0162 Ontario, Petro #0026 Ontario, Flying J #1009 Mira Loma (CA-60), and Pilot #1326 Colton. Flying J #1177 Fontana (I-10 Exit 61) is the next verified CAT east on the same freeway. Superior Scale House in Colton remains the ScaleRegistry dedicated house for this stretch. Coachella Valley / I-10 East is a separate corridor page. Temecula / Corona Love’s omitted (no own-page CAT confirmation used tonight).

6 verified listings · 1 dedicated house · 5 CAT stops · CDFA San Bernardino loaded

Filters hide cards, not industrial rows. CAT will not weigh under 2,000 lb — use a dedicated house for cars and empty utility trailers.

Dedicated public scale

ScaleRegistry lists Superior Scale House in Colton. It does not publish hours, fees, or a phone. We did not invent them. Call before you drive. Not a DOT station.

Dedicated publicCall firstNot a DOT station

Superior Scale House

601 S Hunts Ln, Colton, CA 92324 · Map

Certified ticket
Unknown
Livestock
Unknown — we do not invent livestock policy.
24-hour
Unknown
Hours / access
Hours not verified — call.

Listed by ScaleRegistry as a public scale in Colton. ScaleRegistry does not publish hours, fees, phone, or certification status. It did not come from a CDFA county table on this compile (Riverside c=33 and San Bernardino c=36 grids did not load). Call before you drive. Not a DOT station.

Source: ScaleRegistry public weighing locations · Last checked 2026-08-30

CAT Scale at TA / Petro / Pilot / Flying J

We list only corridor CAT stops verified on the operator’s own location page. TA Ontario and Petro Ontario (I-10 / Milliken / Guasti) each list CAT Scale on ta-petro.com. Flying J #1009 Mira Loma and Pilot #1326 Colton FAQ pages confirm CAT Scale. Flying J Fontana is already on the broader Inland Empire list and sits on this same I-10 run. 2,000 lb floor. No corner weights. Do not unload horses at a truck stop. In California, go inside for a printed weighmaster certificate when you need one. Use CAT’s locator for other stops.

CAT ScaleWalk-up more likelyNot a DOT station

TA Ontario #0162 — CAT Scale

4265 East Guasti Road, Ontario, CA 91761 · Map

(909) 390-2525

Certified ticket
Likely (licensed weighmaster list / CAT)
Livestock
Unknown — we do not invent livestock policy.
24-hour
Travel center listed 24h; confirm scale staffing
Hours / access
TA’s own Ontario page lists fuel 24/7 and CAT Scale among amenities. That is not a published CAT-staffing schedule. Confirm the scale is working before a middle-of-the-night trip.

I-10 at Milliken Ave (Exit 57 area). TA’s own location page lists CAT Scale. Also on CDFA San Bernardino public-scales list (c=36). 2,000 lb CAT floor. In California, go inside for a printed weighmaster certificate when you need one. Not a DOT station.

Source: TA Ontario location page + CDFA San Bernardino public scales · Operator page · Last checked 2026-09-10

CAT ScaleWalk-up more likelyNot a DOT station

Petro Ontario #0026 — CAT Scale

4325 E. Guasti Rd., Ontario, CA 91761 · Map

(909) 390-7800

Certified ticket
Likely (licensed weighmaster list / CAT)
Livestock
Unknown — we do not invent livestock policy.
24-hour
Travel center listed 24h; confirm scale staffing
Hours / access
Petro’s own Ontario page lists fuel 24/7 and CAT Scale among amenities. That is not a published CAT-staffing schedule. Confirm the scale is working before a middle-of-the-night trip.

I-10 & Milliken Ave Exit 57; next door to TA Ontario on Guasti Rd. Petro’s own location page lists CAT Scale. Also on CDFA San Bernardino public-scales list (c=36). 2,000 lb CAT floor. Not a DOT station.

Source: Petro Ontario location page + CDFA San Bernardino public scales · Operator page · Last checked 2026-09-10

CAT ScaleWalk-up more likelyNot a DOT station

Flying J Travel Center #1009 — CAT Scale (Mira Loma)

11053 Riverside Dr, Mira Loma, CA 91752 · Map

(951) 681-1032

Certified ticket
Likely (licensed weighmaster list / CAT)
Livestock
Unknown — we do not invent livestock policy.
24-hour
Travel center listed 24h; confirm scale staffing
Hours / access
Pilot Flying J’s location page lists the travel center open 24 hours and FAQ confirms a CAT scale. That is not the same as a published CAT-staffing schedule. Confirm the scale is working before a middle-of-the-night trip.

CA-60 Exit 42 (Riverside Dr / Mira Loma / Jurupa Valley). Pilot Flying J’s own page FAQ confirms CAT Scale. 2,000 lb floor. In California, go inside for a printed weighmaster certificate when you need one. Not a DOT station.

Source: Pilot Flying J Mira Loma location page · Operator page · Last checked 2026-09-10

CAT ScaleWalk-up more likelyNot a DOT station

Pilot Travel Center #1326 — CAT Scale (Colton)

2300 E Steel Rd, Colton, CA 92324 · Map

(909) 780-1019

Certified ticket
Likely (licensed weighmaster list / CAT)
Livestock
Unknown — we do not invent livestock policy.
24-hour
Travel center listed 24h; confirm scale staffing
Hours / access
Pilot Flying J’s location page lists the travel center open 24 hours and FAQ confirms a CAT scale. That is not the same as a published CAT-staffing schedule. Confirm the scale is working before a middle-of-the-night trip.

I-10 Exit 73A east / 72 west (Steel Rd). Pilot’s own page FAQ confirms CAT Scale. Near Superior Scale House (dedicated) in Colton. 2,000 lb floor. Not a DOT station.

Source: Pilot Flying J Colton location page · Operator page · Last checked 2026-09-10

CAT ScaleWalk-up more likelyNot a DOT station

Flying J Travel Center #1177 — CAT Scale (Fontana)

14320 Slover Ave, Fontana, CA 92337 · Map

(909) 574-4866

Certified ticket
Likely (licensed weighmaster list / CAT)
Livestock
Unknown — we do not invent livestock policy.
24-hour
Travel center listed 24h; confirm scale staffing
Hours / access
Pilot Flying J’s location page lists the travel center open 24 hours and lists CAT Scale as an amenity. That is not the same as a published CAT-staffing schedule. Confirm the scale is working before a middle-of-the-night trip.

Pilot Flying J’s own Fontana / Slover Ave location page (I-10 Exit 61) lists CAT Scale among amenities and the FAQ confirms a CAT scale. Inland Empire I-10 corridor — not on the I-15 High Desert page. CAT 2,000 lb floor; no corner weights. In California, go inside for a printed weighmaster certificate when you need one. Do not unload horses in the lot. Confirm on CAT’s locator. Not a DOT station.

Source: Pilot Flying J location page — Fontana / Slover Ave · Operator page · Last checked 2026-09-08

Do not go here for a ticket

California Commercial Vehicle Enforcement Facilities (CHP weigh stations) are for commercial enforcement — not a place to buy a civilian weighmaster ticket for a U-Haul, RV, horse trailer, or PPM load. See Caltrans’ weigh-station primer and follow posted signs; do not treat this directory as a bypass guide.

Source: Caltrans — Weigh-Stations (Enforcement Facilities)

What we still need to verify

Hours, fees, and livestock at Superior Scale House. CAT staffing (store listed 24h ≠ published scale schedule). Temecula / Corona Love’s or TA Murrieta without an operator page we treat as primary for CAT. CDFA San Bernardino industrial / quarry / scrap / truck-stop rows not featured as walk-up ticket shops. TA Coachella still omitted (third-party only).

Sources: CDFA San Bernardino public scales · TA Ontario · Petro Ontario · Flying J #1009 Mira Loma · Pilot #1326 Colton · Flying J #1177 Fontana · ScaleRegistry · CAT Scale locator (linked, not republished)

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