Boston Marathon logo
BOSTON MARATHON 2023

Su Ng

Bib: 19316•F

NY

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 47%
Masters (Masters Women)
#0 / 6539
Top 36%
Division (F45-49)
#0 / 1817
Top 42%
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
8:21/mi
25:58
↑ 97↓ 3451.5%
10K· 6.21 mi
8:06/mi
51:07
↑ 79↓ 1380.4%
15K· 9.32 mi
8:09/mi
1:16:27
↑ 67↓ 78
20K· 12.43 mi
8:20/mi
1:42:20
↑ 106↓ 860.1%
Half· 13.11 mi
8:12/mi
1:47:56
↑ 19↓ 370.5%
25K· 15.53 mi
8:21/mi
2:08:10
↑ 66↓ 880.2%
30K· 18.64 mi
8:39/mi
2:35:01
↑ 181↓ 1480.2%
20M
8:59/mi
2:47:13
↑ 64↓ 500.2%
21M
9:26/mi
2:56:39
↑ 106↓ 241.6%
35K· 21.75 mi
8:44/mi
3:03:11
↑ 17↓ 861.7%
23M
9:06/mi
3:14:35
↑ 23↓ 630.6%
24M
8:54/mi
3:23:29
↓ 821.3%
40K· 24.85 mi
8:52/mi
3:31:04
↓ 200.3%
25.2M
9:43/mi
3:34:25
↑ 13↓ 160.2%
Finish· 26.22 mi
8:53/mi
3:43:28
↑ 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
Time1:47:56
Pace8:14 /mi
2nd Half
Distance13.11 mi
Time1:55:32
Pace8:49 /mi
📊Positive Split: 7.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:3025:588:2125:58
8:21
-
10K
6.21 mi11:42:3951:078:1425:09
8:06
-0:15
15K
9.32 mi12:07:591:16:278:1225:20
8:09
+0:03
20K
12.43 mi12:33:521:42:208:1425:53
8:20
+0:11
Half
13.11 mi12:39:281:47:568:145:36
8:12
-0:08
25K
15.53 mi12:59:422:08:108:1520:14
8:21
+0:09
30K
18.64 mi13:26:332:35:018:1926:51
8:39
+0:18
20M
20.00 mi13:38:452:47:138:2212:12
8:59
+0:20
21M
21.00 mi13:48:112:56:398:259:26
9:26
+0:27
35K
21.75 mi13:54:433:03:118:256:32
8:44
-0:42
23M
23.00 mi14:06:073:14:358:2811:24
9:06
+0:22
24M
24.00 mi14:15:013:23:298:298:54
8:54
-0:12
40K
24.85 mi14:22:363:31:048:307:35
8:52
-0:02
25.2M
25.20 mi14:25:573:34:258:313:21
9:43
+0:51
Finish
26.22 mi14:35:003:43:288:329:03
8:53
-0:50

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

8:06 /mi

Average Pace

8:32 /mi

Slowest Pace

9:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:07:05

84% of race

Time at Steady Pace

33:02

15% of race

Time at Slower Pace

3:21

1% of race

Average Pace: 8:31 /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 mi11:17:3025:588:2125:58
8:21
#16580
10K
6.21 mi11:42:3951:078:1425:09
8:06
#16007
15K
9.32 mi12:07:591:16:278:1225:20
8:09
#15846
20K
12.43 mi12:33:521:42:208:1425:53
8:20
#15815
Half
13.11 mi12:39:281:47:568:145:36
8:12
#15813
25K
15.53 mi12:59:422:08:108:1520:14
8:21
#15693
30K
18.64 mi13:26:332:35:018:1926:51
8:39
#15595
20M
20.00 mi13:38:452:47:138:2212:12
8:59
#15621
21M
21.00 mi13:48:112:56:398:259:26
9:26
#15613
35K
21.75 mi13:54:433:03:118:256:32
8:44
#15644
23M
23.00 mi14:06:073:14:358:2811:24
9:06
#15683
24M
24.00 mi14:15:013:23:298:298:54
8:54
#15733
40K
24.85 mi14:22:363:31:048:307:35
8:52
#15719
25.2M
25.20 mi14:25:573:34:258:313:21
9:43
#15742
Finish
26.22 mi14:35:003:43:288:329:03
8:53
#15794
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi165805655565515548(Top 58%)5013(Top 44%)5013(Top 276%)
10K6.21 mi3.10 mi16007+5735284+3715284+37115500(Top 58%)4963(Top 43%)4963(Top 273%)
15K9.32 mi3.11 mi15846+1615183+1015183+10115548(Top 58%)5013(Top 44%)5013(Top 276%)
20K12.43 mi3.11 mi15815+315191-85191-815815(Top 59%)5237(Top 46%)5237(Top 288%)
Half13.11 mi0.68 mi15813+25194-35194-315912(Top 60%)5244(Top 46%)5244(Top 289%)
25K15.53 mi2.42 mi15693+1205148+465148+4615244(Top 57%)4988(Top 44%)4988(Top 275%)
30K18.64 mi3.11 mi15595+985121+275121+2715191(Top 57%)5055(Top 44%)5055(Top 278%)
20M20.00 mi1.36 mi15621-265165-445165-4416425(Top 62%)5820(Top 51%)5820(Top 320%)
21M21.00 mi1.00 mi15613+85187-225187-2215665(Top 59%)5436(Top 48%)5436(Top 299%)
35K21.75 mi0.75 mi15644-315223-365223-3616602(Top 62%)6042(Top 53%)6042(Top 333%)
23M23.00 mi1.25 mi15683-395274-515274-5116572(Top 62%)6061(Top 53%)6061(Top 334%)
24M24.00 mi1.00 mi15733-505321-475321-4716778(Top 63%)6234(Top 55%)6234(Top 343%)
40K24.85 mi0.85 mi15719+145313+85313+815475(Top 58%)5569(Top 49%)5569(Top 306%)
25.2M25.20 mi0.35 mi15742-235329-165329-1616220(Top 61%)5987(Top 52%)5987(Top 329%)
Finish26.22 mi1.02 mi15794-525373-445373-4417425(Top 65%)6599(Top 58%)6599(Top 363%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21story building
+97ft-345ft

Overall

15548

Females

5013

F45-49

5013

5K→10K

3.1 - 6.2 mi

Top 58%
×5story building
+79ft-138ft

Overall

15500

Females

4963

F45-49

4963

10K→15K

6.2 - 9.3 mi

Top 58%
×3story building
+67ft-78ft

Overall

15548

Females

5013

F45-49

5013

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

15815

Females

5237

F45-49

5237

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

15912

Females

5244

F45-49

5244

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

15244

Females

4988

F45-49

4988

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

15191

Females

5055

F45-49

5055

30K→20M

18.6 - 20.0 mi

Top 62%
×5story building
+64ft-50ft

Overall

16425

Females

5820

F45-49

5820

20M→21M

20.0 - 21.0 mi

Top 59%
×8story building
+106ft-24ft

Overall

15665

Females

5436

F45-49

5436

21M→35K

21.0 - 21.8 mi

Top 62%
×7story building
+17ft-86ft

Overall

16602

Females

6042

F45-49

6042

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

16572

Females

6061

F45-49

6061

23M→24M

23.0 - 24.0 mi

Top 63%
×6story building
+12ft-82ft

Overall

16778

Females

6234

F45-49

6234

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

15475

Females

5569

F45-49

5569

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

16220

Females

5987

F45-49

5987

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2story building
+22ft-21ft

Overall

17425

Females

6599

F45-49

6599

Passing Analysis

Category:
Athletes Passed
2067
Passed By
1281
Net Change
+786
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16580
5K → 10K692119+573#16580#16007
10K → 15K286125+161#16007#15846
15K → 20K189158+31#15846#15815
20K → Half3634+2#15815#15813
Half → 25K18767+120#15813#15693
25K → 30K217119+98#15693#15595
30K → 20M83109-26#15595#15621
20M → 21M8678+8#15621#15613
21M → 35K3869-31#15613#15644
35K → 23M70109-39#15644#15683
23M → 24M50100-50#15683#15733
24M → 40K7056+14#15733#15719
40K → 25.2M2245-23#15719#15742
25.2M → Finish4193-52#15742#15794
TOTALS20671281+786
📊

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