Boston Marathon logo
BOSTON MARATHON 2023

Esther Kim

Bib: 26110•F

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
36:00
Rank: #26264
Start → 5K
36:00 | 11:35/mi
10K· 6.21 mi
1:12:08
Rank: #26168 (+96)
5K → 10K
36:08 | 11:38/mi
15K· 9.32 mi
1:51:44
Rank: #26287 (-119)
10K → 15K
39:36 | 12:45/mi
20K· 12.43 mi
2:32:12
Rank: #26291 (-4)
15K → 20K
40:28 | 13:01/mi
Half· 13.11 mi
2:41:03
Rank: #26304 (-13)
20K → Half
8:51 | 12:58/mi
25K· 15.53 mi
3:14:43
Rank: #26298 (+6)
Half → 25K
33:40 | 13:53/mi
30K· 18.64 mi
4:00:48
Rank: #26358 (-60)
25K → 30K
46:05 | 14:50/mi
20M
4:21:11
Rank: #26363 (-5)
30K → 20M
20:23 | 15:00/mi
21M
4:36:45
Rank: #26373 (-10)
20M → 21M
15:34 | 15:34/mi
35K· 21.75 mi
4:47:32
Rank: #26370 (+3)
21M → 35K
10:47 | 14:25/mi
23M
5:07:01
Rank: #26398 (-28)
35K → 23M
19:29 | 15:34/mi
24M
5:22:23
Rank: #26425 (-27)
23M → 24M
15:22 | 15:22/mi
40K· 24.85 mi
5:35:23
Rank: #26430 (-5)
24M → 40K
13:00 | 15:12/mi
25.2M
5:41:06
Rank: #26433 (-3)
40K → 25.2M
5:43 | 16:35/mi
Finish· 26.22 mi
5:54:39
Rank: #26431 (+2)
25.2M → Finish
13:33 | 13:18/mi

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
Time2:41:03
Pace12:17 /mi
2nd Half
Distance13.11 mi
Time3:13:36
Pace14:46 /mi
📊Positive Split: 20.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:3336:0011:3536:00
11:35
-
10K
6.21 mi12:28:411:12:0811:3736:08
11:38
+0:03
15K
9.32 mi13:08:171:51:4411:5939:36
12:45
+1:07
20K
12.43 mi13:48:452:32:1212:1540:28
13:01
+0:16
Half
13.11 mi13:57:362:41:0312:178:51
12:58
-0:03
25K
15.53 mi14:31:163:14:4312:3233:40
13:53
+0:55
30K
18.64 mi15:17:214:00:4812:5546:05
14:50
+0:57
20M
20.00 mi15:37:444:21:1113:0420:23
15:00
+0:10
21M
21.00 mi15:53:184:36:4513:1115:34
15:34
+0:34
35K
21.75 mi16:04:054:47:3213:1310:47
14:25
-1:09
23M
23.00 mi16:23:345:07:0113:2119:29
15:34
+1:09
24M
24.00 mi16:38:565:22:2313:2615:22
15:22
-0:12
40K
24.85 mi16:51:565:35:2313:3013:00
15:12
-0:10
25.2M
25.20 mi16:57:395:41:0613:325:43
16:35
+1:23
Finish
26.22 mi17:11:125:54:3913:3213:33
13:18
-3:17

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

11:35 /mi

Average Pace

13:32 /mi

Slowest Pace

16:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:54:36

49% of race

Time at Steady Pace

1:50:55

31% of race

Time at Slower Pace

1:09:08

19% of race

Average Pace: 13:32 /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 mi11:52:3336:0011:3536:00
11:35
#26264
10K
6.21 mi12:28:411:12:0811:3736:08
11:38
#26168
15K
9.32 mi13:08:171:51:4411:5939:36
12:45
#26287
20K
12.43 mi13:48:452:32:1212:1540:28
13:01
#26291
Half
13.11 mi13:57:362:41:0312:178:51
12:58
#26304
25K
15.53 mi14:31:163:14:4312:3233:40
13:53
#26298
30K
18.64 mi15:17:214:00:4812:5546:05
14:50
#26358
20M
20.00 mi15:37:444:21:1113:0420:23
15:00
#26363
21M
21.00 mi15:53:184:36:4513:1115:34
15:34
#26373
35K
21.75 mi16:04:054:47:3213:1310:47
14:25
#26370
23M
23.00 mi16:23:345:07:0113:2119:29
15:34
#26398
24M
24.00 mi16:38:565:22:2313:2615:22
15:22
#26425
40K
24.85 mi16:51:565:35:2313:3013:00
15:12
#26430
25.2M
25.20 mi16:57:395:41:0613:325:43
16:35
#26433
Finish
26.22 mi17:11:125:54:3913:3213:33
13:18
#26431
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi26264112061120626421(Top 99%)11309(Top 99%)11309(Top 232%)
10K6.21 mi3.10 mi26168+9611146+6011146+6026061(Top 98%)11077(Top 97%)11077(Top 227%)
15K9.32 mi3.11 mi26287-11911224-7811224-7826421(Top 99%)11309(Top 99%)11309(Top 232%)
20K12.43 mi3.11 mi26291-411220+411220+426238(Top 99%)11195(Top 98%)11195(Top 229%)
Half13.11 mi0.68 mi26304-1311228-811228-826349(Top 99%)11272(Top 99%)11272(Top 231%)
25K15.53 mi2.42 mi26298+611224+411224+426296(Top 99%)11241(Top 98%)11241(Top 230%)
30K18.64 mi3.11 mi26358-6011265-4111265-4126370(Top 99%)11298(Top 99%)11298(Top 231%)
20M20.00 mi1.36 mi26363-511271-611271-626296(Top 99%)11281(Top 99%)11281(Top 231%)
21M21.00 mi1.00 mi26373-1011278-711278-726054(Top 98%)11143(Top 98%)11143(Top 228%)
35K21.75 mi0.75 mi26370+311276+211276+226281(Top 99%)11268(Top 99%)11268(Top 231%)
23M23.00 mi1.25 mi26398-2811295-1911295-1926419(Top 99%)11336(Top 99%)11336(Top 232%)
24M24.00 mi1.00 mi26425-2711311-1611311-1626458(Top 99%)11355(Top 99%)11355(Top 232%)
40K24.85 mi0.85 mi26430-511317-611317-626234(Top 99%)11278(Top 99%)11278(Top 231%)
25.2M25.20 mi0.35 mi26433-311320-311320-326283(Top 99%)11293(Top 99%)11293(Top 231%)
Finish26.22 mi1.02 mi26431+211319+111319+126116(Top 98%)11228(Top 98%)11228(Top 230%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 99%
×21stories
+97ft-345ft

Overall

26421

Females

11309

F18-39

11309

5K→10K

3.1 - 6.2 mi

Top 98%
×5stories
+79ft-138ft

Overall

26061

Females

11077

F18-39

11077

10K→15K

6.2 - 9.3 mi

Top 99%
×3stories
+67ft-78ft

Overall

26421

Females

11309

F18-39

11309

15K→20K

9.3 - 12.4 mi

Top 99%
×5stories
+106ft-86ft

Overall

26238

Females

11195

F18-39

11195

20K→Half

12.4 - 13.1 mi

Top 99%
×2stories
+19ft-37ft

Overall

26349

Females

11272

F18-39

11272

Half→25K

13.1 - 15.5 mi

Top 99%
×4stories
+66ft-88ft

Overall

26296

Females

11241

F18-39

11241

25K→30K

15.5 - 18.6 mi

Top 99%
×9stories
+181ft-148ft

Overall

26370

Females

11298

F18-39

11298

30K→20M

18.6 - 20.0 mi

Top 99%
×5stories
+64ft-50ft

Overall

26296

Females

11281

F18-39

11281

20M→21M

20.0 - 21.0 mi

Top 98%
×8stories
+106ft-24ft

Overall

26054

Females

11143

F18-39

11143

21M→35K

21.0 - 21.8 mi

Top 99%
×7stories
+17ft-86ft

Overall

26281

Females

11268

F18-39

11268

35K→23M

21.8 - 23.0 mi

Top 99%
×5stories
+23ft-63ft

Overall

26419

Females

11336

F18-39

11336

23M→24M

23.0 - 24.0 mi

Top 99%
×6stories
+12ft-82ft

Overall

26458

Females

11355

F18-39

11355

24M→40K

24.0 - 24.9 mi

Top 99%
×1story
+6ft-20ft

Overall

26234

Females

11278

F18-39

11278

40K→25.2M

24.9 - 25.2 mi

Top 99%
×1story
+13ft-16ft

Overall

26283

Females

11293

F18-39

11293

25.2M→Finish

25.2 - 26.2 mi

Top 98%
×2stories
+22ft-21ft

Overall

26116

Females

11228

F18-39

11228

Passing Analysis

Category:
Athletes Passed
279
Passed By
446
Net Change
-167
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26264
5K → 10K12428+96#26264#26168
10K → 15K11130-119#26168#26287
15K → 20K4145-4#26287#26291
20K → Half821-13#26291#26304
Half → 25K2721+6#26304#26298
25K → 30K1171-60#26298#26358
30K → 20M1419-5#26358#26363
20M → 21M818-10#26363#26373
21M → 35K85+3#26373#26370
35K → 23M735-28#26370#26398
23M → 24M027-27#26398#26425
24M → 40K712-5#26425#26430
40K → 25.2M25-3#26430#26433
25.2M → Finish119+2#26433#26431
TOTALS279446-167
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing