Grand Rapids Triathlon (Half)
Ada, United States · June · Independent (Grand Rapids Triathlon)
Why people love it
- Calm, lake-like Thornapple River swim with minimal current; past water was 20 to 24 °C (68 to 76 °F)
- Rolling, fast 90 km (56 mi) bike with about 460 m (1,500 ft) of climbing
- Praised organization and run aid every 1.6 km (1 mi)
- Time-trial swim start self-seeded by pace, plus first-timer wristbands
- Airport about 20 km (12 mi) away
Watch out for
- Open roads: traffic and some rough sections at the start and end of the bike
- Crosswinds and rain in some past years
- About 0.8 km (0.5 mi) paved run from swim exit to T1
- Limited lodging in Ada; no on-site parking, shuttles from downtown
- Last 24 km (15 mi) of the bike overlap with Olympic riders
Race
How racers feel about it, how well it is run, and how it treats a first timer. Counts for 27% of the overall score.
- Racer satisfactionLoved4.1
Slowtwitch posters from 2019 to 2022 praise the run, the organization and the fast bike; the field is small and reviews are few. · Medium confidence
- OrganizationFlawless4.5
Several racers call it amazingly well run and top-notch for a small race; packet pickup was slow one year. · Medium confidence
- First timer friendlyFriendly3.9
Self-seeded swim, first-timer wristbands and a calm river, but open roads and a steep late run hill. · Low confidence
Course traits, not part of the score
- PR potentialFast3.6
The organizer calls the bike flat and fast, but a finisher logged about 460 m (1,500 ft) of climbing and crosswinds hit some years. · Low confidence
- Course easeTough3.4
A rolling bike and late run hills in mostly mild conditions. · Low confidence
Swim
Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 15% of the overall score.
- Wetsuit legalUsually4.3
The organizer says wetsuits have been legal historically, with water of 20 to 24 °C (68 to 76 °F). · Medium confidence
- Water temperatureComfortable4.0
Past water of 20 to 24 °C (68 to 76 °F) is comfortable for most. · Medium confidence
- Calm waterGlassy4.5
A lake-like river stretch with minimal current; calm in 2022. · Medium confidence
- Swim easeEasy3.5
Time-trial start limits contact, but one racer found it hard to sight and the return faces the sun. · Medium confidence
- Swim experienceGreat3.8
One racer called the swim nearly perfect; the start is slow, the exit ramp small and the run to T1 is 0.8 km (0.5 mi). · Medium confidence
Bike
Road surface, closures, scenery and wind. Counts for 19% of the overall score.
- Road surfaceMixed3.4
Much repaved in 2021, but the first and last sections are rough. · Medium confidence
- Road closuresPartly closed2.5
An open course with marshals and police at intersections; some cars cut in. · Medium confidence
- Bike sceneryPleasant3.4
Country roads; scenery is not a highlight. · Low confidence
- WindSome wind3.0
Wind is hit and miss, with crosswinds in some years. · Medium confidence
Course traits, not part of the score
- Bike speedFast3.9
Several riders call it fast and rolling, with much of the road repaved in 2021. · Medium confidence
- Bike flatnessMostly flat3.8
About 460 m (1,500 ft) of climbing over 90 km (56 mi), rolling rather than flat. · Medium confidence
- Bike simplicityMostly simple3.8
Not described as technical. · Low confidence
Run
Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.
- Crowd supportDecent3.0
A small field over a two-day festival, with village sections. · Low confidence
- Aid stationsGood4.4
Aid every 1.6 km (1 mi), with volunteers handing out cups. · Medium confidence
- Run sceneryPleasant3.4
Roads and village; scenery is not emphasised. · Low confidence
- Run conditionsEasy3.5
Decent shade and a short soft dirt stretch; it got hot one year. · Low confidence
Course traits, not part of the score
- Run flatnessRolling3.2
Two rolling hills and a steep climb near the end. · Medium confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 15% of the overall score.
- Air temperaturePleasant4.2
About 16 °C (60 °F) at 7 am rising to 21 to 23 °C (70 to 73 °F) in 2022. · Medium confidence
- Weather reliabilityVariable3.0
Rain has been common in past years, along with crosswinds. · Medium confidence
- Venue beautyLovely3.7
River, Ada Park and a covered bridge. · Low confidence
- Spectator friendlyEasy3.6
Transition and finish sit together in Ada Park. · Low confidence
Course traits, not part of the score
- Low altitudeSea level4.6
About 230 m (750 ft). · High confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 11% of the overall score.
- Hotel availabilityBook early3.3
Limited lodging in Ada; Grand Rapids is about 10 minutes away. · Medium confidence
- Hotel valueGood3.6
No pricing data found. · Low confidence
- WalkabilitySome driving2.8
No on-site parking; shuttles run from downtown Ada. · Medium confidence
- Travel easeEasy4.2
Grand Rapids airport is about 20 km (12 mi) away. · High confidence
- LogisticsSome complexity3.4
One transition, but a long T1 run and shuttle parking. · Medium confidence
- Town and foodGood4.2
Ada and Grand Rapids offer a strong restaurant scene. · Medium confidence
Key facts
- Location
- Ada, Michigan, United States
- Typical month
- June
- Latest or next date
- 13 June 2027
- Organiser
- Independent (Grand Rapids Triathlon)
- Field size
- About 1,300 athletes
- Distances
- 1.9 km (1.2 mi) swim, 90 km (56 mi) bike, 21.1 km (13.1 mi) run
- Swim venue
- Thornapple River, lake-like stretch from the boat launch to Ada Park (river)
- Water temperature
- 20–24 °C (68–75 °F)
- Wetsuit
- Legal
- Swim start
- time-trial, self-seeded by pace
- Swim laps
- 1
- Bike climbing
- 460 m (1,510 ft)
- Bike laps
- 1
- Run laps
- 1
- Run shade
- Decent shade
- Air temperature
- 16–23 °C (61–73 °F)
- Altitude
- 230 m (755 ft)
- Nearest airport
- Gerald R. Ford International (GRR), 20 km (12 mi) away
- Where to stay
- Ada, Grand Rapids
- Booking
- Limited lodging in Ada itself; a 2022 racer stayed in Grand Rapids about 10 minutes away.
What racers and reviewers say
- Slowtwitch: First 70.3-Distance Completed/Grand Rapids Tri ReviewRaced 2022 · forum · Positive
First-time half finisher: calm 68 F (20 C) river swim with a time-trial start, rolling bike with about 460 m (1,500 ft) of climbing, three aid points, safe feeling with marshals, and a run with two rolling hills and a steep one late. Calls organization top-notch for a small race; wall late in the run. Small field of about 210 in the half.
“top-notch for a relatively small race”
- Slowtwitch: Grand Rapids Tri (2021 thread)Raced 2021 · forum · Positive
Swim nearly perfect but a slow start and small exit ramp; bike fast and rolling with wind a factor and only a couple of rude drivers; run awesome with a hill that keeps you honest and plenty of aid. Packet pickup was slow and rain has been common.
“The run was awesome”
- Slowtwitch: Grand Rapids Tri (2021 thread)Raced 2019 · forum · Mixed
Warns the swim is hard to sight, the first and last bike sections are rough, cars can cut in because roads are not closed, and crosswinds were bad one year. Still calls the event amazingly well run.
“Amazingly well run”
- Slowtwitch: Grand Rapids Tri (2021 thread)Raced 2021 · forum · Positive
Race director says much of the course was repaved, that it is relatively flat with false flats on Grand River, and that aid stations now have volunteers set cups on tables. Treat as organizer view.
- WOOD-TV: Grand Rapids Triathlon returns to Ada TownshipRaced 2025 · article · Positive
2025 local news: about 1,300 athletes across four distances over two days, race director calls the bike course really flat.
Show 2 more
- Triathlete: best 70.3 races in the USARaced 2024 · article · Positive
Calls it Michigan's largest independent triathlon, with sprint and super sprint on Saturday, Olympic and half Sunday, and green wristbands for first-timers.
- Grand Rapids Tri official FAQRaced 2025 · article · Positive
Organizer FAQ: lake-like river swim with minimal current, historic water 68-76 F (20-24 C), wetsuit legal, off-site parking with shuttles from downtown Ada.
Sources
Pages we used for facts and ratings. See how we rate.
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