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BOSTON MARATHON 2025

Sunduk Kim

Bib: 17665•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 44%
Gender (Female)
#0 / 12228
Top 29%
Masters (Masters Women)
#0 / 6759
Top 14%
Division (F45-49)
#0 / 1813
Top 16%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:31
Rank: #12864
Start → 5K
23:31 | 7:34/mi
10K· 6.21 mi
46:48
Rank: #12426 (+438)
5K → 10K
23:17 | 7:30/mi
15K· 9.32 mi
1:10:25
Rank: #12479 (-53)
10K → 15K
23:37 | 7:36/mi
20K· 12.43 mi
1:34:23
Rank: #12453 (+26)
15K → 20K
23:58 | 7:43/mi
Half· 13.11 mi
1:39:35
Rank: #12469 (-16)
20K → Half
5:12 | 7:37/mi
25K· 15.53 mi
1:58:35
Rank: #12474 (-5)
Half → 25K
19:00 | 7:50/mi
30K· 18.64 mi
2:23:28
Rank: #12240 (+234)
25K → 30K
24:53 | 8:01/mi
20M
2:34:58
Rank: #12309 (-69)
30K → 20M
11:30 | 8:28/mi
21M
2:44:44
Rank: #12653 (-344)
20M → 21M
9:46 | 9:46/mi
35K· 21.75 mi
2:50:27
Rank: #12520 (+133)
21M → 35K
5:43 | 7:38/mi
23M
3:00:56
Rank: #12500 (+20)
35K → 23M
10:29 | 8:22/mi
24M
3:08:55
Rank: #12417 (+83)
23M → 24M
7:59 | 7:59/mi
40K· 24.85 mi
3:15:58
Rank: #12368 (+49)
24M → 40K
7:03 | 8:15/mi
25.2M
3:19:28
Rank: #12469 (-101)
40K → 25.2M
3:30 | 10:09/mi
Finish· 26.22 mi
3:28:02
Rank: #12596 (-127)
25.2M → Finish
8:34 | 8:24/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:35
Pace7:36 /mi
2nd Half
Distance13.11 mi
Time1:48:27
Pace8:16 /mi
📊Positive Split: 8.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:0623:317:3423:31
7:34
-
10K
6.21 mi11:37:2346:487:3223:17
7:30
-0:04
15K
9.32 mi12:01:001:10:257:3323:37
7:36
+0:06
20K
12.43 mi12:24:581:34:237:3623:58
7:43
+0:07
Half
13.11 mi12:30:101:39:357:365:12
7:37
-0:06
25K
15.53 mi12:49:101:58:357:3819:00
7:50
+0:13
30K
18.64 mi13:14:032:23:287:4224:53
8:01
+0:11
20M
20.00 mi13:25:332:34:587:4511:30
8:28
+0:27
21M
21.00 mi13:35:192:44:447:519:46
9:46
+1:18
35K
21.75 mi13:41:022:50:277:505:43
7:38
-2:08
23M
23.00 mi13:51:313:00:567:5210:29
8:22
+0:44
24M
24.00 mi13:59:303:08:557:527:59
7:59
-0:23
40K
24.85 mi14:06:333:15:587:537:03
8:15
+0:16
25.2M
25.20 mi14:10:033:19:287:553:30
10:09
+1:54
Finish
26.22 mi14:18:373:28:027:568:34
8:24
-1:45

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

7:30 /mi

Average Pace

7:56 /mi

Slowest Pace

10:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:10:25

34% of race

Time at Steady Pace

1:33:48

45% of race

Time at Slower Pace

43:49

21% of race

Average Pace: 7:56 /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 mi11:14:0623:317:3423:31
7:34
#12864
10K
6.21 mi11:37:2346:487:3223:17
7:30
#12426
15K
9.32 mi12:01:001:10:257:3323:37
7:36
#12479
20K
12.43 mi12:24:581:34:237:3623:58
7:43
#12453
Half
13.11 mi12:30:101:39:357:365:12
7:37
#12469
25K
15.53 mi12:49:101:58:357:3819:00
7:50
#12474
30K
18.64 mi13:14:032:23:287:4224:53
8:01
#12240
20M
20.00 mi13:25:332:34:587:4511:30
8:28
#12309
21M
21.00 mi13:35:192:44:447:519:46
9:46
#12653
35K
21.75 mi13:41:022:50:277:505:43
7:38
#12520
23M
23.00 mi13:51:313:00:567:5210:29
8:22
#12500
24M
24.00 mi13:59:303:08:557:527:59
7:59
#12417
40K
24.85 mi14:06:333:15:587:537:03
8:15
#12368
25.2M
25.20 mi14:10:033:19:287:553:30
10:09
#12469
Finish
26.22 mi14:18:373:28:027:568:34
8:24
#12596
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi128643247324712616(Top 44%)3228(Top 26%)3228(Top 178%)
10K6.21 mi3.10 mi12426+4383025+2223025+22212056(Top 42%)2849(Top 23%)2849(Top 157%)
15K9.32 mi3.11 mi12479-533091-663091-6612616(Top 44%)3228(Top 26%)3228(Top 178%)
20K12.43 mi3.11 mi12453+263119-283119-2812560(Top 44%)3306(Top 27%)3306(Top 182%)
Half13.11 mi0.68 mi12469-163133-143133-1412828(Top 45%)3407(Top 28%)3407(Top 188%)
25K15.53 mi2.42 mi12474-53177-443177-4412651(Top 45%)3475(Top 28%)3475(Top 192%)
30K18.64 mi3.11 mi12240+2343125+523125+5211459(Top 40%)3014(Top 25%)3014(Top 166%)
20M20.00 mi1.36 mi12309-693202-773202-7713549(Top 48%)4266(Top 35%)4266(Top 235%)
21M21.00 mi1.00 mi12653-3443421-2193421-21917336(Top 61%)6438(Top 53%)6438(Top 355%)
35K21.75 mi0.75 mi12520+1333374+473374+479709(Top 34%)2484(Top 20%)2484(Top 137%)
23M23.00 mi1.25 mi12500+203403-293403-2912514(Top 44%)3999(Top 33%)3999(Top 221%)
24M24.00 mi1.00 mi12417+833384+193384+1911156(Top 39%)3388(Top 28%)3388(Top 187%)
40K24.85 mi0.85 mi12368+493386-23386-211855(Top 42%)3842(Top 31%)3842(Top 212%)
25.2M25.20 mi0.35 mi12469-1013455-693455-6917685(Top 62%)6937(Top 57%)6937(Top 383%)
Finish26.22 mi1.02 mi12596-1273548-933548-9315629(Top 55%)5811(Top 48%)5811(Top 321%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21stories
+97ft-345ft

Overall

12616

Females

3228

F45-49

3228

5K→10K

3.1 - 6.2 mi

Top 42%
×5stories
+79ft-138ft

Overall

12056

Females

2849

F45-49

2849

10K→15K

6.2 - 9.3 mi

Top 44%
×3stories
+67ft-78ft

Overall

12616

Females

3228

F45-49

3228

15K→20K

9.3 - 12.4 mi

Top 44%
×5stories
+106ft-86ft

Overall

12560

Females

3306

F45-49

3306

20K→Half

12.4 - 13.1 mi

Top 45%
×2stories
+19ft-37ft

Overall

12828

Females

3407

F45-49

3407

Half→25K

13.1 - 15.5 mi

Top 45%
×4stories
+66ft-88ft

Overall

12651

Females

3475

F45-49

3475

25K→30K

15.5 - 18.6 mi

Top 40%
×9stories
+181ft-148ft

Overall

11459

Females

3014

F45-49

3014

30K→20M

18.6 - 20.0 mi

Top 48%
×5stories
+64ft-50ft

Overall

13549

Females

4266

F45-49

4266

20M→21M

20.0 - 21.0 mi

Top 61%
×8stories
+106ft-24ft

Overall

17336

Females

6438

F45-49

6438

21M→35K

21.0 - 21.8 mi

Top 34%
×7stories
+17ft-86ft

Overall

9709

Females

2484

F45-49

2484

35K→23M

21.8 - 23.0 mi

Top 44%
×5stories
+23ft-63ft

Overall

12514

Females

3999

F45-49

3999

23M→24M

23.0 - 24.0 mi

Top 39%
×6stories
+12ft-82ft

Overall

11156

Females

3388

F45-49

3388

24M→40K

24.0 - 24.9 mi

Top 42%
×1story
+6ft-20ft

Overall

11855

Females

3842

F45-49

3842

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

17685

Females

6937

F45-49

6937

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2stories
+22ft-21ft

Overall

15629

Females

5811

F45-49

5811

Passing Analysis

Category:
Athletes Passed
2097
Passed By
1829
Net Change
+268
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12864
5K → 10K555117+438#12864#12426
10K → 15K155208-53#12426#12479
15K → 20K208182+26#12479#12453
20K → Half2440-16#12453#12469
Half → 25K156161-5#12469#12474
25K → 30K349115+234#12474#12240
30K → 20M94163-69#12240#12309
20M → 21M36380-344#12309#12653
21M → 35K1407+133#12653#12520
35K → 23M11999+20#12520#12500
23M → 24M11734+83#12500#12417
24M → 40K8839+49#12417#12368
40K → 25.2M12113-101#12368#12469
25.2M → Finish44171-127#12469#12596
TOTALS20971829+268
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing