The long course season is now underway, and this winter's short course results have already painted a compelling picture of where the Girls 10&Under NAG records stand heading into the summer. Several marks — some dating back a decade — are drawing serious attention from a talented and deep crop of age-eligible swimmers.

Below is a look at each standing record, the current top candidates based on 2025–26 SCY performance, and a classical conversion projection of what those times could translate to in long course. Projections are estimates, not predictions — but they're useful for calibrating just how close (or far) the records really are.

The Record Holders & The Candidates

50 Freestyle — NAG: 28.15 | Adele Zyniewicz (2016)

At over a decade old, this record has outlasted a lot of challengers. The current projection gap is real — the top three candidates convert in the 29.8–30.9 range — but Adeline Farrier (10) is worth watching closely. Her 26.17 SCY this season is genuinely fast for 10-and-under, and her last season LCM best of 32.19 leaves plenty of room to grow once she's swimming in a 50-meter pool. Lola Southard (10) is right behind at 26.43 SCY. Neither is converting near the record on paper, but both swimmers are moving quickly and long course efficiency tends to look different from these projections in practice.

Record looks safe for now, but the class of 2026 bears watching if either swimmer takes a big LCM step forward.

100 Freestyle — NAG: 1:01.29 | Leah Hayes (2016)

Another 2016 record, this one held by Leah Hayes, who also owns the 200 free NAG. The field here is strong. Adeline Farrier leads with a 57.80 SCY, projecting to 1:05.76 LCM — well off the record but showing genuine distance speed for her age. More interesting is Olivia Covey (10), whose last season real LCM best of 1:07.83 already suggests she translates well to long course. Her 59.10 SCY this season projects to 1:07.20, which aligns closely with what she's already done.

Record remains comfortably protected, but Covey's LCM track record makes her one to watch once pools open.

200 Freestyle — NAG: 2:14.39 | Leah Hayes (2016)

Hayes holds three records in this dataset, and the 200 free may be her most durable. The converted projections for the top three candidates (2:24–2:27) fall roughly 10–13 seconds short on paper. Addie Farrier leads the field at 2:07.54 SCY (projects to 2:24.77), with Olivia Covey (2:29.24 last season LCM best) and Hadley Wheeler (10) close behind. Wheeler, whose 2:09.83 SCY at the NT Texas Age Group Championship is her season-best, also showed meaningful improvement in LCM last summer.

The gap is too large for a realistic challenge this cycle, but Covey's existing 2:29 LCM provides a genuine baseline.

Here's the new section to insert — place it after the 200 Freestyle section and before 50 Backstroke:

400 Freestyle — NAG: 4:37.41 | Claire Tuggle (2015)

Another 2015 record with a comfortable margin. The projected gap here is significant — all three candidates convert in the 5:02–5:07 range, leaving roughly 25–30 seconds between the field and Tuggle's mark. Adeline Farrier leads at 5:39.37 SCY (5:02.89 projected) with no last season LCM reference, meaning this may be her first real crack at the 400 free in long course. Hadley Wheeler (10) is close behind at 5:42.50 SCY (5:05.68 projected) and already has a real LCM best of 5:23.81 from last summer — the most meaningful baseline in this group. Reign Belzer (10) rounds out the field at 5:44.11 SCY (5:07.12 projected), with a last season LCM best of 5:13.05 that actually puts her ahead of her own conversion — a good sign for her long course efficiency at distance.

The record is well protected for now. But Belzer's 5:13 real LCM swim is the most interesting data point — she's already well ahead of what the conversion math suggests.

50 Backstroke — NAG: 32.18 | Miriam Sheehan (2015)

Sheehan's 2015 marks in the 50 and 100 back have proven remarkably resilient. The 50 back field is led by Reign Belzer (10), who has posted a 30.11 SCY — converting to a projected 34.02 LCM — alongside a last season LCM best of 36.61 that shows she still has ground to cover in the long course pool. Adeline Farrier is right there at 30.38 SCY (34.32 projected), and Annie Ma (10) rounds out the group at 30.98 SCY. Ma's LCM best of 39.46 is notably farther back than her SCY projection suggests, hinting at limited LCM experience so far.

All three candidates convert 1.8–2.8 seconds above the record. Safe for now.

100 Backstroke — NAG: 1:09.36 | Miriam Sheehan (2015)

This is one of the more interesting events on the list. Adeline Farrier leads with a 1:04.01 SCY (projecting 1:12.25), but her only last season LCM reference of 1:19.96 indicates she hasn't had much long course backstroke experience yet — meaning the projection may actually be conservative if she adjusts well. Hadley Wheeler (10) also deserves attention: her 1:05.63 SCY (1:14.05 projected) comes with a 1:19.85 last season LCM best, nearly identical to Farrier's. Reign Belzer (10) is third at 1:07.17 SCY, but she notably has a real LCM mark of 1:16.82 from last summer — already a bit ahead of where her projection might suggest.

Record still has a comfortable margin, but this event has three swimmers developing in parallel. One to revisit mid-summer.

50 Breaststroke — NAG: 36.06 | Leah Hayes (2016)

The Hayes trifecta continues. The 50 breast is where things get interesting in a different way: Sophia Hunter (10) and Iris Liu (9) both project in the 38.5–38.6 range from their SCY bests, but their last season LCM references tell very different stories. Liu already has a real LCM best of 40.24 — notably ahead of Hunter's 1:02.10 (which appears to be a 100 breast time listed as her only LCM reference, suggesting limited 50 breast LCM history). Emma Zhang (10) rounds out the group at 34.83 SCY (39.66 projected), with a 41.12 last season LCM best.

Liu's 40.24 LCM best at age 9 is the most telling data point here — she's already swimming it and will have another full summer.

100 Breaststroke — NAG: 1:17.74 | Meghan Lynch (2014)

The oldest record in this dataset, and perhaps the most fortified. Iris Liu (9) leads at 1:15.99 SCY (1:26.35 projected), followed closely by Emma Zhang (10) at 1:16.61 SCY. Notably, Zhang already owns a real LCM best of 1:26.25 — better than her own projection — which is a strong sign that her SCY-to-LCM conversion is efficient. Shay Kaplan (10) is third at 1:16.95 SCY with no last season LCM reference on record.

The record has stood for over a decade for a reason. But Liu at 9 years old with a 1:15 SCY is a name to file away for the next cycle.

50 Butterfly — NAG: 29.48 | Miriam Sheehan (2015)

Addie Farrier tops the fly events as well, with a 27.57 SCY that projects to 31.30 LCM — about 1.8 seconds above the record. Lola Southard (10) and Eva Rossetti (10) follow at 28.59 and 28.81 SCY respectively, projecting to 32.43 and 32.68. All three showed improvement from their last season LCM bests (33.66, 34.97, 34.14), which is an encouraging sign. None are projecting close to Sheehan's record, but the event is competitive within the age group.

100 Butterfly — NAG: 1:07.07 | Raquel Maldonado (2019)

The most recently set record in the dataset, and it shows — this one has more cushion. Adeline Farrier leads at 1:02.14 SCY (1:10.38 projected), with Lola Southard and Reign Belzer both projecting around 1:12.4–1:12.6. Southard's last season LCM best of 1:35.11 suggests she's still very early in her long course 100 fly development. Belzer, by contrast, already has a 1:17.20 from last summer, making her the most experienced of the three in this event.

Maldonado's 2019 mark still has meaningful protection. The field is developing, not threatening — yet.

200 IM — NAG: 2:28.70 | Kayla Han (2019)

Another recent-era record that won't go quietly. Adeline Farrier leads with a 2:21.70 SCY (2:40.49 projected), followed by Hadley Wheeler (2:24.04 SCY, 2:43.08 projected) and Olivia Covey (2:24.92 SCY, 2:44.06 projected). Wheeler and Covey both have last season LCM IM bests in the 2:49–2:55 range, suggesting their projections are actually ahead of where they've been — a good sign for development, but also a reminder that conversion math doesn't always hold in the IM.

The 200 IM record appears safe for 2026, but the three-way competition at the top of this event is worth following.

Recurring Names & Overall Takeaways

A few swimmers show up across multiple events, suggesting broad talent rather than specialist profiles:

• Adeline Farrier (10) appears in nearly every freestyle, backstroke, and butterfly event — arguably the most versatile 10-under swimmer in this dataset.
• Reign Belzer (10) surfaces in backstroke, breaststroke, and butterfly, with some of the most developed last season LCM reference times of any candidate.
• Olivia Covey (10) and Hadley Wheeler (10) are consistent mid-distance threats across free and IM events.
• Iris Liu (9) stands out as the youngest candidate on the list — appearing in both breaststroke events with times that are already competitive for her age group heading into next season.

None of the records appear on the verge of falling based on projections alone, but several — particularly the 2015 Sheehan backstroke marks and the 2014 Lynch 100 breast — have been standing long enough that continued pressure from this crop will eventually tell. The long course season will reveal who converts well and who has even more in the tank than the short course numbers suggest.

All projections use classical SCY-to-LCM conversion. Converted times are estimates only. Age eligibility based on August 1, 2026 cutoff.