Boston Marathon logo
BOSTON MARATHON 2023

Nguyen Luu

Bib: 21127•F

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 44%
Masters (Masters Women)
#0 / 6539
Top 32%
Division (F50-54)
#0 / 1207
Top 24%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:24/mi
26:05
↑ 97↓ 3451.5%
10K· 6.21 mi
8:11/mi
51:32
↑ 79↓ 1380.4%
15K· 9.32 mi
8:11/mi
1:16:59
↑ 67↓ 78
20K· 12.43 mi
8:18/mi
1:42:47
↑ 106↓ 860.1%
Half· 13.11 mi
7:59/mi
1:48:14
↑ 19↓ 370.5%
25K· 15.53 mi
8:19/mi
2:08:24
↑ 66↓ 880.2%
30K· 18.64 mi
8:37/mi
2:35:10
↑ 181↓ 1480.2%
20M
8:35/mi
2:46:50
↑ 64↓ 500.2%
21M
9:20/mi
2:56:10
↑ 106↓ 241.6%
35K· 21.75 mi
8:12/mi
3:02:18
↑ 17↓ 861.7%
23M
8:38/mi
3:13:06
↑ 23↓ 630.6%
24M
8:24/mi
3:21:30
↓ 821.3%
40K· 24.85 mi
8:42/mi
3:28:56
↓ 200.3%
25.2M
9:37/mi
3:32:15
↑ 13↓ 160.2%
Finish· 26.22 mi
8:52/mi
3:41:17
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:14
Pace8:15 /mi
2nd Half
Distance13.11 mi
Time1:53:03
Pace8:37 /mi
📊Positive Split: 4.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:4926:058:2426:05
8:24
-
10K
6.21 mi11:44:1651:328:1825:27
8:11
-0:13
15K
9.32 mi12:09:431:16:598:1625:27
8:11
0:00
20K
12.43 mi12:35:311:42:478:1625:48
8:18
+0:07
Half
13.11 mi12:40:581:48:148:155:27
7:59
-0:19
25K
15.53 mi13:01:082:08:248:1620:10
8:19
+0:20
30K
18.64 mi13:27:542:35:108:1926:46
8:37
+0:18
20M
20.00 mi13:39:342:46:508:2011:40
8:35
-0:02
21M
21.00 mi13:48:542:56:108:239:20
9:20
+0:45
35K
21.75 mi13:55:023:02:188:236:08
8:12
-1:08
23M
23.00 mi14:05:503:13:068:2410:48
8:38
+0:26
24M
24.00 mi14:14:143:21:308:248:24
8:24
-0:14
40K
24.85 mi14:21:403:28:568:247:26
8:42
+0:18
25.2M
25.20 mi14:24:593:32:158:253:19
9:37
+0:55
Finish
26.22 mi14:34:013:41:178:279:02
8:52
-0:45

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:59 /mi

Average Pace

8:27 /mi

Slowest Pace

9:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

56:21

25% of race

Time at Steady Pace

1:38:15

44% of race

Time at Slower Pace

1:06:41

30% of race

Average Pace: 8:26 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:18:4926:058:2426:05
8:24
#16852
10K
6.21 mi11:44:1651:328:1825:27
8:11
#16461
15K
9.32 mi12:09:431:16:598:1625:27
8:11
#16243
20K
12.43 mi12:35:311:42:478:1625:48
8:18
#16061
Half
13.11 mi12:40:581:48:148:155:27
7:59
#15962
25K
15.53 mi13:01:082:08:248:1620:10
8:19
#15788
30K
18.64 mi13:27:542:35:108:1926:46
8:37
#15637
20M
20.00 mi13:39:342:46:508:2011:40
8:35
#15509
21M
21.00 mi13:48:542:56:108:239:20
9:20
#15448
35K
21.75 mi13:55:023:02:188:236:08
8:12
#15368
23M
23.00 mi14:05:503:13:068:2410:48
8:38
#15260
24M
24.00 mi14:14:143:21:308:248:24
8:24
#15179
40K
24.85 mi14:21:403:28:568:247:26
8:42
#15151
25.2M
25.20 mi14:24:593:32:158:253:19
9:37
#15147
Finish
26.22 mi14:34:013:41:178:279:02
8:52
#15253
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi168525825582515814(Top 59%)5174(Top 45%)5174(Top 429%)
10K6.21 mi3.10 mi16461+3915559+2665559+26616202(Top 61%)5399(Top 47%)5399(Top 447%)
15K9.32 mi3.11 mi16243+2185434+1255434+12515814(Top 59%)5174(Top 45%)5174(Top 429%)
20K12.43 mi3.11 mi16061+1825345+895345+8915636(Top 59%)5116(Top 45%)5116(Top 424%)
Half13.11 mi0.68 mi15962+995285+605285+6014379(Top 54%)4323(Top 38%)4323(Top 358%)
25K15.53 mi2.42 mi15788+1745204+815204+8115074(Top 57%)4890(Top 43%)4890(Top 405%)
30K18.64 mi3.11 mi15637+1515143+615143+6115015(Top 56%)4937(Top 43%)4937(Top 409%)
20M20.00 mi1.36 mi15509+1285095+485095+4814202(Top 53%)4544(Top 40%)4544(Top 376%)
21M21.00 mi1.00 mi15448+615089+65089+615196(Top 57%)5168(Top 45%)5168(Top 428%)
35K21.75 mi0.75 mi15368+805049+405049+4013495(Top 51%)4294(Top 38%)4294(Top 356%)
23M23.00 mi1.25 mi15260+1084999+504999+5013965(Top 52%)4598(Top 40%)4598(Top 381%)
24M24.00 mi1.00 mi15179+814964+354964+3513908(Top 52%)4623(Top 40%)4623(Top 383%)
40K24.85 mi0.85 mi15151+284967-34967-314492(Top 54%)5022(Top 44%)5022(Top 416%)
25.2M25.20 mi0.35 mi15147+44977-104977-1015773(Top 59%)5729(Top 50%)5729(Top 475%)
Finish26.22 mi1.02 mi15253-1065053-765053-7617349(Top 65%)6557(Top 57%)6557(Top 543%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21story building
+97ft-345ft

Overall

15814

Females

5174

F50-54

5174

5K→10K

3.1 - 6.2 mi

Top 61%
×5story building
+79ft-138ft

Overall

16202

Females

5399

F50-54

5399

10K→15K

6.2 - 9.3 mi

Top 59%
×3story building
+67ft-78ft

Overall

15814

Females

5174

F50-54

5174

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

15636

Females

5116

F50-54

5116

20K→Half

12.4 - 13.1 mi

Top 54%
×2story building
+19ft-37ft

Overall

14379

Females

4323

F50-54

4323

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

15074

Females

4890

F50-54

4890

25K→30K

15.5 - 18.6 mi

Top 56%
×9story building
+181ft-148ft

Overall

15015

Females

4937

F50-54

4937

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

14202

Females

4544

F50-54

4544

20M→21M

20.0 - 21.0 mi

Top 57%
×8story building
+106ft-24ft

Overall

15196

Females

5168

F50-54

5168

21M→35K

21.0 - 21.8 mi

Top 51%
×7story building
+17ft-86ft

Overall

13495

Females

4294

F50-54

4294

35K→23M

21.8 - 23.0 mi

Top 52%
×5story building
+23ft-63ft

Overall

13965

Females

4598

F50-54

4598

23M→24M

23.0 - 24.0 mi

Top 52%
×6story building
+12ft-82ft

Overall

13908

Females

4623

F50-54

4623

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

14492

Females

5022

F50-54

5022

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

15773

Females

5729

F50-54

5729

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2story building
+22ft-21ft

Overall

17349

Females

6557

F50-54

6557

Passing Analysis

Category:
Athletes Passed
2455
Passed By
856
Net Change
+1599
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16852
5K → 10K540149+391#16852#16461
10K → 15K31496+218#16461#16243
15K → 20K26280+182#16243#16061
20K → Half1012+99#16061#15962
Half → 25K23157+174#15962#15788
25K → 30K24998+151#15788#15637
30K → 20M15325+128#15637#15509
20M → 21M11857+61#15509#15448
21M → 35K9313+80#15448#15368
35K → 23M14335+108#15368#15260
23M → 24M10625+81#15260#15179
24M → 40K7345+28#15179#15151
40K → 25.2M3834+4#15151#15147
25.2M → Finish34140-106#15147#15253
TOTALS2455856+1599
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing