Your rabbit.
Your road.
Your race.
Open Road Ace puts a GPS pace car on your dash. Real-time delta to the rabbit, precision finish scoring, and the confidence to run your number — mile after mile across west Texas.
The pace car that never misses a beat
In open road racing, your target speed is everything. Miss it by two miles an hour and you're out of contention. Open Road Ace runs a virtual “rabbit” at your exact target pace and shows you — in real time — how far ahead or behind you are.
Built for events like the Big Bend Open Road Race, where the road is 118 miles of west Texas highway and the margin between winning and losing is measured in tenths of a second.
118 miles of west Texas highway.
One perfect number.
Open road racing isn't drag racing. It isn't circuit racing. There are no tracks, no walls, no grandstands. It's you, your car, and US-285 between Fort Stockton and Sanderson — closed for one day, running a target speed as precisely as a machine.
At the Big Bend Open Road Race, competitors launch one at a time from a GPS-synchronized starting tree. The goal isn't the fastest time — it's the most accurate. Pick your speed class, hold your number for 118 miles through Big Bend country, and the driver closest to perfect takes the trophy. In 2009, the top 30 finishers out of 159 were less than one second off their target average.
Corvettes are the most popular car on the line — 73 entries in a typical year. Mustangs, Porsches, Vipers, Cobras, and the occasional legend like a V-12 Jag or a built El Camino. What they all share is a deep appreciation for their machine and a desire to drive it right — not just fast, but precisely.
The timing system uses GPS satellites broadcasting time accurate to microseconds. Black boxes synchronize start and finish 60 miles apart. Accuracy better than 1/10,000th of a second. Open Road Ace is built on the same GNSS technology — to give you eyes on the rabbit, every second, every mile.
The starting tree
Every BBORR run begins here. The programmable tree counts down your launch, synced to GPS satellite time accurate to microseconds. A u-blox GNSS receiver drives the clock. Black boxes synchronize timing between start and finish 60 miles apart — accuracy better than 1/10,000th of a second. Open Road Ace locks to the same GNSS time source, so your rabbit launches in perfect sync with the official clock.
Built for open road racing everywhere
Four steps. One perfect run.
From arming to finish, Open Road Ace keeps it simple.
Set your course and target speed
Load your course profile — or create a custom one with start and finish gates. Set your target MPH. The app does the rest.
Arm and launch
Arm the race and wait for the tree. The app’s countdown is synced to the same GNSS signal as the starting tree — when the green drops, your rabbit launches at exactly your target speed.
Chase the rabbit
Your delta to the rabbit updates in real time — in feet, with directional chevrons telling you to speed up or slow down. Glanceable at 100+ MPH.
Nail the finish
Precision gate detection scores your finish to hundredths of a second. See your delta, your average speed, and exactly where you landed relative to the rabbit.
Pace any road you can drive.
Setting up your local road takes one practice run. After that, every run is on rails.
Open the Custom Course Wizard
Tap the gear icon → Custom Courses. Choose Record a new route.
Drive your road once
Tap Start. Drive the route you'll race — beginning to end, in the direction you'll run it. The app captures GPS samples the whole way.
Stop and name it
Tap Stop at the finish. Give the course a name (e.g. "Memorial Outbound"). The app saves your polyline plus start and finish hints derived from your first and last GPS points.
Pick it on race day
On Setup, your course shows up under Custom Courses. Tap it. Gates are derived from your recorded endpoints — no surveying, no spreadsheets.
Already have a GPX file?
The wizard also imports GPX from any source — Strava, Garmin Connect, hand-built tracks. Same gate-from-endpoints behavior. You can also drop GPX or saved-course JSON files directly into the app's CustomCourses folder via the iPhone Files app.
Built for the open road
Every feature exists because a racer needed it at 130 MPH.
Real-time rabbit delta
See your distance to the rabbit in feet, updated live. Chevron urgency indicators tell you how much correction you need at a glance.
Works with your GPS — including RTK
Use an ArduSimple simpleRTK2B for cm-level multiband L1/L2 with NTRIP corrections (the same precision survey crews use), a RaceBox Mini for 25 Hz BLE precision, or your iPhone’s built-in GPS. Three tiers, one app — pick what your race needs.
Multi-leg events
Run two-leg out-and-back courses with automatic rabbit offset carry-over between legs. One event, one combined score.
GNSS-synced start
The starting tree runs on a u-blox GNSS receiver — the same chip family inside RaceBox and the ArduSimple simpleRTK2B. The app’s timer locks to the same satellite time signal. When the green drops, your rabbit and the official clock are in perfect sync.
Precision finish scoring
Gate-based finish detection with nose offset correction scores your run to hundredths of a second.
Course management
Load built-in BBORR profiles or create custom courses with your own start and finish gates. Drive any road, anywhere.
ORA Test Course
Two-leg event at 45 mph target, 3.10 mi total. ArduSimple RTK kit + u-blox NTRIP corrections.
“I used to guess my pace and hope for the best at the finish gate. Now I know exactly where I stand, every second of the run. It's like having a co-driver who never blinks.”
Ready to run your number?
Download Open Road Ace, set your target, and see the difference precision pacing makes on your next run.
Requires iPhone with iOS 17+. Works with ArduSimple RTK, XGPS-160, RaceBox Mini, RaceBox Micro, or iPhone GPS.