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BOSTON MARATHON 2025

Sang Choi

Bib: 23812•F

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 45%
Division (F55-59)
#0 / 994
Top 25%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:40
Rank: #23322
Start → 5K
9:14/mi
28:40 split
10K· 6.21 mi
55:29
Rank: #22106 (+1216)
5K → 10K
8:38/mi
26:49 split
15K· 9.32 mi
1:21:23
Rank: #20917 (+1189)
10K → 15K
8:20/mi
25:54 split
20K· 12.43 mi
1:47:38
Rank: #20198 (+719)
15K → 20K
8:27/mi
26:15 split
Half· 13.11 mi
1:53:20
Rank: #20089 (+109)
20K → Half
8:21/mi
5:42 split
25K· 15.53 mi
2:13:59
Rank: #19655 (+434)
Half → 25K
8:31/mi
20:39 split
30K· 18.64 mi
2:41:10
Rank: #19019 (+636)
25K → 30K
8:45/mi
27:11 split
20M
2:53:09
Rank: #18773 (+246)
30K → 20M
8:49/mi
11:59 split
21M
3:02:34
Rank: #18581 (+192)
20M → 21M
9:25/mi
9:25 split
35K· 21.75 mi
3:08:51
Rank: #18442 (+139)
21M → 35K
8:24/mi
6:17 split
23M
3:20:04
Rank: #18279 (+163)
35K → 23M
8:58/mi
11:13 split
24M
3:29:04
Rank: #18222 (+57)
23M → 24M
9:00/mi
9:00 split
40K· 24.85 mi
3:36:52
Rank: #18163 (+59)
24M → 40K
9:07/mi
7:48 split
25.2M
3:40:22
Rank: #18171 (-8)
40K → 25.2M
10:09/mi
3:30 split
Finish· 26.22 mi
3:49:20
Rank: #18165 (+6)
25.2M → Finish
8:48/mi
8:58 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:20
Pace8:39 /mi
2nd Half
Distance13.11 mi
Time1:56:00
Pace8:51 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:2128:409:1428:40
9:14
-
10K
6.21 mi12:13:1055:298:5626:49
8:38
-0:36
15K
9.32 mi12:39:041:21:238:4425:54
8:20
-0:18
20K
12.43 mi13:05:191:47:388:4026:15
8:27
+0:07
Half
13.11 mi13:11:011:53:208:395:42
8:21
-0:06
25K
15.53 mi13:31:402:13:598:3820:39
8:31
+0:10
30K
18.64 mi13:58:512:41:108:3927:11
8:45
+0:14
20M
20.00 mi14:10:502:53:098:3911:59
8:49
+0:04
21M
21.00 mi14:20:153:02:348:429:25
9:25
+0:36
35K
21.75 mi14:26:323:08:518:416:17
8:24
-1:01
23M
23.00 mi14:37:453:20:048:4211:13
8:58
+0:34
24M
24.00 mi14:46:453:29:048:439:00
9:00
+0:02
40K
24.85 mi14:54:333:36:528:447:48
9:07
+0:07
25.2M
25.20 mi14:58:033:40:228:453:30
10:09
+1:02
Finish
26.22 mi15:07:013:49:208:458:58
8:48
-1:21

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

8:20 /mi

Average Pace

8:45 /mi

Slowest Pace

10:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:24:47

37% of race

Time at Steady Pace

1:35:10

41% of race

Time at Slower Pace

49:23

22% of race

Average Pace: 8:45 /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 mi11:46:2128:409:1428:40
9:14
#23322
10K
6.21 mi12:13:1055:298:5626:49
8:38
#22106
15K
9.32 mi12:39:041:21:238:4425:54
8:20
#20917
20K
12.43 mi13:05:191:47:388:4026:15
8:27
#20198
Half
13.11 mi13:11:011:53:208:395:42
8:21
#20089
25K
15.53 mi13:31:402:13:598:3820:39
8:31
#19655
30K
18.64 mi13:58:512:41:108:3927:11
8:45
#19019
20M
20.00 mi14:10:502:53:098:3911:59
8:49
#18773
21M
21.00 mi14:20:153:02:348:429:25
9:25
#18581
35K
21.75 mi14:26:323:08:518:416:17
8:24
#18442
23M
23.00 mi14:37:453:20:048:4211:13
8:58
#18279
24M
24.00 mi14:46:453:29:048:439:00
9:00
#18222
40K
24.85 mi14:54:333:36:528:447:48
9:07
#18163
25.2M
25.20 mi14:58:033:40:228:453:30
10:09
#18171
Finish
26.22 mi15:07:013:49:208:458:58
8:48
#18165
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi233229339933918310(Top 64%)6500(Top 53%)6500(Top 654%)
10K6.21 mi3.10 mi22106+12168672+6678672+66720517(Top 72%)7750(Top 63%)7750(Top 780%)
15K9.32 mi3.11 mi20917+11897999+6737999+67318310(Top 64%)6500(Top 53%)6500(Top 654%)
20K12.43 mi3.11 mi20198+7197589+4107589+41017893(Top 63%)6287(Top 51%)6287(Top 632%)
Half13.11 mi0.68 mi20089+1097526+637526+6318365(Top 65%)6542(Top 54%)6542(Top 658%)
25K15.53 mi2.42 mi19655+4347290+2367290+23617319(Top 61%)6041(Top 49%)6041(Top 608%)
30K18.64 mi3.11 mi19019+6366967+3236967+32316307(Top 57%)5640(Top 46%)5640(Top 567%)
20M20.00 mi1.36 mi18773+2466843+1246843+12415800(Top 56%)5486(Top 45%)5486(Top 552%)
21M21.00 mi1.00 mi18581+1926767+766767+7615736(Top 55%)5576(Top 46%)5576(Top 561%)
35K21.75 mi0.75 mi18442+1396703+646703+6414909(Top 52%)5198(Top 43%)5198(Top 523%)
23M23.00 mi1.25 mi18279+1636640+636640+6316063(Top 57%)5928(Top 48%)5928(Top 596%)
24M24.00 mi1.00 mi18222+576640664017389(Top 61%)6702(Top 55%)6702(Top 674%)
40K24.85 mi0.85 mi18163+596634+66634+617002(Top 60%)6585(Top 54%)6585(Top 662%)
25.2M25.20 mi0.35 mi18171-86655-216655-2117727(Top 62%)6979(Top 57%)6979(Top 702%)
Finish26.22 mi1.02 mi18165+66661-66661-618056(Top 64%)7113(Top 58%)7113(Top 716%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

18310

Females

6500

F55-59

6500

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

20517

Females

7750

F55-59

7750

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

18310

Females

6500

F55-59

6500

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

17893

Females

6287

F55-59

6287

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

18365

Females

6542

F55-59

6542

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

17319

Females

6041

F55-59

6041

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

16307

Females

5640

F55-59

5640

30K→20M

18.6 - 20.0 mi

Top 56%
×5story building
+64ft-50ft

Overall

15800

Females

5486

F55-59

5486

20M→21M

20.0 - 21.0 mi

Top 55%
×8story building
+106ft-24ft

Overall

15736

Females

5576

F55-59

5576

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

14909

Females

5198

F55-59

5198

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

16063

Females

5928

F55-59

5928

23M→24M

23.0 - 24.0 mi

Top 61%
×6story building
+12ft-82ft

Overall

17389

Females

6702

F55-59

6702

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

17002

Females

6585

F55-59

6585

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

17727

Females

6979

F55-59

6979

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2story building
+22ft-21ft

Overall

18056

Females

7113

F55-59

7113

Passing Analysis

Category:
Athletes Passed
5432
Passed By
275
Net Change
+5157
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23322
5K → 10K122711+1216#23322#22106
10K → 15K11923+1189#22106#20917
15K → 20K7245+719#20917#20198
20K → Half1112+109#20198#20089
Half → 25K4395+434#20089#19655
25K → 30K6459+636#19655#19019
30K → 20M25913+246#19019#18773
20M → 21M21725+192#18773#18581
21M → 35K1445+139#18581#18442
35K → 23M18522+163#18442#18279
23M → 24M10144+57#18279#18222
24M → 40K9435+59#18222#18163
40K → 25.2M2836-8#18163#18171
25.2M → Finish6660+6#18171#18165
TOTALS5432275+5157
📊

Passing Visuals

Category:
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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