IRONMAN 70.3 Chattanooga Race Guide: Course Maps, Schedule, Nutrition & Execution
- Nick Tranbarger
- 6 days ago
- 3 min read
There’s a reason IRONMAN 70.3 Chattanooga keeps drawing athletes back year after year—it’s not just a race, it’s an experience. A fast-moving river start, a rolling bike course that demands respect, and a run that tests both your legs and your mindset. This is the kind of course where smart execution beats raw fitness, and where every decision you make—from pacing to fueling—shows up when it matters most. If you’re ready to race with intention, Chattanooga will reward you.
Swim Course Breakdown
From the swim course map:
Start is ~1.4 miles upriver from Ross’s Landing
Point-to-point downstream swim
Clearly marked with:
Red Turn buoys
Yellow Outbound + Orange return sighting buoys
Exit flows directly toward transition
What the Map Tells You
This is not just “fast”—it’s line-dependent
Poor sighting = lost free speed from current
The course is relatively straight → efficiency matters more than power
Swim Strategy
Seed conservatively in rolling start
Prioritize straight-line swimming
Stay relaxed early—this swim can trick you into overexerting
Bike Course Breakdown
From the official bike course map and profile:
1-loop course starting at Ross’s Landing
Key sections include:
Riverfront Parkway exit
St. Elmo → Hwy 193
West Cove Rd + Andrews Lane
Chickamauga / Hwy 341
Elevation:
Start: 709 ft
Gain: 2,218 ft total
What the Elevation Profile Actually Shows
This isn’t a “climb-heavy” course—it’s worse:
It’s a constant rolling resistance course with no true recovery zones.
From the profile:
Repeated rollers from miles ~10–45
No sustained climbs—but constant pressure on legs
Bike Execution Strategy
Avoid power spikes on short climbs
Stay aero whenever terrain allows
Fuel consistently (see nutrition section below)
Intermediate Cutoff
Mile 30.4 cutoff at 11:55 AM
This matters more than most athletes realize—especially if pacing or fueling goes wrong early.
Run Course Breakdown
From the official run map:
2.25 laps
Key features:
Riverwalk segments
Veterans Bridge crossing
Northshore loops
Elevation gain: 627 ft
What the Course Layout Tells You
Multiple turns = rhythm disruption
Bridge crossings = subtle energy cost
Multi-lap = mental fatigue factor
Run Strategy
First lap = control effort
Second lap = manage fatigue
Final section = only push if stable
Aid Stations & On-Course Nutrition
From the aid station infographic (page 13):
Bike Aid Stations (Every 12–15 miles)
Offerings include:
Water
Precision Fuel & Hydration
Maurten Gel 100 + CAF
Maurten Solid 225
Bars + bananas
Toilets
IM 70.3 Chattanooga Bike Course Nutrition
Run Aid Stations (Every ~1 mile)
Offerings include:
Water
Precision Fuel & Hydration
Cola
Maurten gels
Bars, chips, pretzels
Bananas + oranges
IM 70.3 Chattanooga Run Course Nutrition
Critical Rule from Guide:
All trash must be discarded in designated zones—or you receive a penalty.
Race Week Logistics
Athlete Check-In (Mandatory)
Friday: 2 PM – 7 PM
Saturday: 9 AM – 4 PM
No race-day check-in allowed
What You Receive:
Bib (run only)
Bike + helmet stickers
Swim cap
Timing chip
Wristband (required for access)
Morning clothes bag
Bike Check-In (Critical)
Saturday: 10 AM – 5 PM
Bike must stay overnight in transition
Race Morning Flow
Transition open: 4:30–6:15 AM
Shuttle to swim start available
Gear must fit under bike
Cutoffs & Timing
Swim cutoff: 1:20
Bike cutoff: 5:30 total
Run cutoff: 8:30 total race time
Intermediate cutoffs:
Bike: Mile 30.4
Run: Mile 6.8
Race-Day Execution Strategy (Putting It All Together)
Swim
Controlled start
Efficient line
No surging
Bike
Conservative at the start
Smooth power on rollers
Fuel early and consistently (If you drop your bottle, stop and pick it up before continuing.)
Run
Execute your plan to be more conservative in the first half
Be ready to elevate your effort after the halfway point
Finish strong!
Most Overlooked Athlete Guide Details
These are the ones athletes miss:
No training on swim course pre-race
Timing chip MUST be worn entire race
Wristband required for transition access
Must stop if issued penalty (or risk DSQ)
Medical assistance does NOT result in penalty
Final Coaching Takeaway
This course is not about raw fitness.
It’s about managing effort across a deceptively demanding bike and staying composed through a mentally taxing run.
Athletes who respect the course layout—especially the rollers and multi-lap run—are the ones who perform best.
NVDM Coaching looks forward to celebrating with you at IRONMAN 70.3 Chattanooga!
NVDM Coaching helps athletes execute—not just train. From pacing to fueling to race-day logistics, we make sure you show up prepared.