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BOSTON MARATHON 2025

Young-Sook Kwon

Bib: 25087•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F70-74)
#0 / 71
Top 18%
Race Day Weather
50°/40°F
broken clouds

⏱️ 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
9:14/mi
28:42
↑ 97↓ 3451.5%
10K· 6.21 mi
9:17/mi
57:31
↑ 79↓ 1380.4%
15K· 9.32 mi
9:33/mi
1:27:10
↑ 67↓ 78
20K· 12.43 mi
9:58/mi
1:58:09
↑ 106↓ 860.1%
Half· 13.11 mi
9:33/mi
2:04:40
↑ 19↓ 370.5%
25K· 15.53 mi
10:00/mi
2:28:55
↑ 66↓ 880.2%
30K· 18.64 mi
10:40/mi
3:02:04
↑ 181↓ 1480.2%
20M
10:50/mi
3:16:47
↑ 64↓ 500.2%
21M
11:40/mi
3:28:27
↑ 106↓ 241.6%
35K· 21.75 mi
10:12/mi
3:36:05
↑ 17↓ 861.7%
23M
10:38/mi
3:49:24
↑ 23↓ 630.6%
24M
10:13/mi
3:59:37
↓ 821.3%
40K· 24.85 mi
10:25/mi
4:08:31
↓ 200.3%
25.2M
11:39/mi
4:12:32
↑ 13↓ 160.2%
Finish· 26.22 mi
10:00/mi
4:22:43
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:04:40
Pace9:31 /mi
2nd Half
Distance13.11 mi
Time2:18:03
Pace10:32 /mi
📊Positive Split: 10.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:1628:429:1428:42
9:14
-
10K
6.21 mi12:13:0557:319:1528:49
9:17
+0:03
15K
9.32 mi12:42:441:27:109:2129:39
9:33
+0:16
20K
12.43 mi13:13:431:58:099:3030:59
9:58
+0:25
Half
13.11 mi13:20:142:04:409:316:31
9:33
-0:25
25K
15.53 mi13:44:292:28:559:3524:15
10:00
+0:27
30K
18.64 mi14:17:383:02:049:4633:09
10:40
+0:40
20M
20.00 mi14:32:213:16:479:5014:43
10:50
+0:10
21M
21.00 mi14:44:013:28:279:5611:40
11:40
+0:50
35K
21.75 mi14:51:393:36:059:567:38
10:12
-1:28
23M
23.00 mi15:04:583:49:249:5813:19
10:38
+0:26
24M
24.00 mi15:15:113:59:379:5910:13
10:13
-0:25
40K
24.85 mi15:24:054:08:3110:008:54
10:25
+0:12
25.2M
25.20 mi15:28:064:12:3210:014:01
11:39
+1:14
Finish
26.22 mi15:38:174:22:4310:0210:11
10:00
-1:39

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

9:14 /mi

Average Pace

10:02 /mi

Slowest Pace

11:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:33:41

36% of race

Time at Steady Pace

1:32:10

35% of race

Time at Slower Pace

1:16:52

29% of race

Average Pace: 10:01 /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 mi11:44:1628:429:1428:42
9:14
#23351
10K
6.21 mi12:13:0557:319:1528:49
9:17
#23409
15K
9.32 mi12:42:441:27:109:2129:39
9:33
#23609
20K
12.43 mi13:13:431:58:099:3030:59
9:58
#23762
Half
13.11 mi13:20:142:04:409:316:31
9:33
#23766
25K
15.53 mi13:44:292:28:559:3524:15
10:00
#23657
30K
18.64 mi14:17:383:02:049:4633:09
10:40
#23581
20M
20.00 mi14:32:213:16:479:5014:43
10:50
#23552
21M
21.00 mi14:44:013:28:279:5611:40
11:40
#23515
35K
21.75 mi14:51:393:36:059:567:38
10:12
#23445
23M
23.00 mi15:04:583:49:249:5813:19
10:38
#23402
24M
24.00 mi15:15:113:59:379:5910:13
10:13
#23340
40K
24.85 mi15:24:054:08:3110:008:54
10:25
#23260
25.2M
25.20 mi15:28:064:12:3210:014:01
11:39
#23245
Finish
26.22 mi15:38:174:22:4310:0210:11
10:00
#23242
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF70-74Seg. OverallSeg. FemalesSeg. F70-74
5K3.11 mi3.11 mi233519358935823866(Top 84%)9581(Top 78%)9581(Top 13494%)
10K6.21 mi3.10 mi23409-589370-129370-1223448(Top 83%)9383(Top 77%)9383(Top 13215%)
15K9.32 mi3.11 mi23609-2009466-969466-9623866(Top 84%)9581(Top 78%)9581(Top 13494%)
20K12.43 mi3.11 mi23762-1539557-919557-9124172(Top 85%)9815(Top 80%)9815(Top 13824%)
Half13.11 mi0.68 mi23766-49554+39554+323731(Top 84%)9554(Top 78%)9554(Top 13456%)
25K15.53 mi2.42 mi23657+1099509+459509+4523268(Top 82%)9343(Top 76%)9343(Top 13159%)
30K18.64 mi3.11 mi23581+769502+79502+723325(Top 82%)9507(Top 78%)9507(Top 13390%)
20M20.00 mi1.36 mi23552+299507-59507-523244(Top 82%)9552(Top 78%)9552(Top 13454%)
21M21.00 mi1.00 mi23515+379506+19506+122967(Top 81%)9483(Top 78%)9483(Top 13356%)
35K21.75 mi0.75 mi23445+709483+239483+2322464(Top 79%)9274(Top 76%)9274(Top 13062%)
23M23.00 mi1.25 mi23402+439475+89475+822376(Top 79%)9272(Top 76%)9272(Top 13059%)
24M24.00 mi1.00 mi23340+629463+129463+1222002(Top 77%)9138(Top 75%)9138(Top 12870%)
40K24.85 mi0.85 mi23260+809439+249439+2421689(Top 76%)9039(Top 74%)9039(Top 12731%)
25.2M25.20 mi0.35 mi23245+159438+19438+122474(Top 79%)9397(Top 77%)9397(Top 13235%)
Finish26.22 mi1.02 mi23242+39447-99447-922935(Top 81%)9636(Top 79%)9636(Top 13572%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 84%
×21story building
+97ft-345ft

Overall

23866

Females

9581

F70-74

9581

5K→10K

3.1 - 6.2 mi

Top 83%
×5story building
+79ft-138ft

Overall

23448

Females

9383

F70-74

9383

10K→15K

6.2 - 9.3 mi

Top 84%
×3story building
+67ft-78ft

Overall

23866

Females

9581

F70-74

9581

15K→20K

9.3 - 12.4 mi

Top 85%
×5story building
+106ft-86ft

Overall

24172

Females

9815

F70-74

9815

20K→Half

12.4 - 13.1 mi

Top 84%
×2story building
+19ft-37ft

Overall

23731

Females

9554

F70-74

9554

Half→25K

13.1 - 15.5 mi

Top 82%
×4story building
+66ft-88ft

Overall

23268

Females

9343

F70-74

9343

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

23325

Females

9507

F70-74

9507

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

23244

Females

9552

F70-74

9552

20M→21M

20.0 - 21.0 mi

Top 81%
×8story building
+106ft-24ft

Overall

22967

Females

9483

F70-74

9483

21M→35K

21.0 - 21.8 mi

Top 79%
×7story building
+17ft-86ft

Overall

22464

Females

9274

F70-74

9274

35K→23M

21.8 - 23.0 mi

Top 79%
×5story building
+23ft-63ft

Overall

22376

Females

9272

F70-74

9272

23M→24M

23.0 - 24.0 mi

Top 77%
×6story building
+12ft-82ft

Overall

22002

Females

9138

F70-74

9138

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

21689

Females

9039

F70-74

9039

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

22474

Females

9397

F70-74

9397

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2story building
+22ft-21ft

Overall

22935

Females

9636

F70-74

9636

Passing Analysis

Category:
Athletes Passed
1374
Passed By
1265
Net Change
+109
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23351
5K → 10K211269-58#23351#23409
10K → 15K111311-200#23409#23609
15K → 20K90243-153#23609#23762
20K → Half1822-4#23762#23766
Half → 25K16657+109#23766#23657
25K → 30K188112+76#23657#23581
30K → 20M9061+29#23581#23552
20M → 21M8548+37#23552#23515
21M → 35K8818+70#23515#23445
35K → 23M8138+43#23445#23402
23M → 24M8624+62#23402#23340
24M → 40K9313+80#23340#23260
40K → 25.2M2611+15#23260#23245
25.2M → Finish4138+3#23245#23242
TOTALS13741265+109
📊

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