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BOSTON MARATHON 2025

Gyoung Sook Lee

Bib: 23390•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 50%
Masters (Masters Women)
#0 / 6759
Top 39%
Division (F50-54)
#0 / 1303
Top 33%
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
7:52/mi
24:25
↑ 97↓ 3451.5%
10K· 6.21 mi
8:00/mi
49:16
↑ 79↓ 1380.4%
15K· 9.32 mi
8:08/mi
1:14:31
↑ 67↓ 78
20K· 12.43 mi
8:19/mi
1:40:21
↑ 106↓ 860.1%
Half· 13.11 mi
8:02/mi
1:45:50
↑ 19↓ 370.5%
25K· 15.53 mi
8:35/mi
2:06:38
↑ 66↓ 880.2%
30K· 18.64 mi
9:02/mi
2:34:42
↑ 181↓ 1480.2%
20M
9:23/mi
2:47:27
↑ 64↓ 500.2%
21M
9:46/mi
2:57:13
↑ 106↓ 241.6%
35K· 21.75 mi
8:41/mi
3:03:43
↑ 17↓ 861.7%
23M
9:11/mi
3:15:13
↑ 23↓ 630.6%
24M
9:03/mi
3:24:16
↓ 821.3%
40K· 24.85 mi
9:14/mi
3:32:10
↓ 200.3%
25.2M
10:06/mi
3:35:39
↑ 13↓ 160.2%
Finish· 26.22 mi
9:08/mi
3:44:57
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:50
Pace8:04 /mi
2nd Half
Distance13.11 mi
Time1:59:07
Pace9:05 /mi
📊Positive Split: 12.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:4124:257:5224:25
7:52
-
10K
6.21 mi11:47:3249:167:5624:51
8:00
+0:08
15K
9.32 mi12:12:471:14:318:0025:15
8:08
+0:08
20K
12.43 mi12:38:371:40:218:0425:50
8:19
+0:11
Half
13.11 mi12:44:061:45:508:045:29
8:02
-0:17
25K
15.53 mi13:04:542:06:388:0920:48
8:35
+0:33
30K
18.64 mi13:32:582:34:428:1828:04
9:02
+0:27
20M
20.00 mi13:45:432:47:278:2212:45
9:23
+0:21
21M
21.00 mi13:55:292:57:138:269:46
9:46
+0:23
35K
21.75 mi14:01:593:03:438:276:30
8:41
-1:05
23M
23.00 mi14:13:293:15:138:2911:30
9:11
+0:30
24M
24.00 mi14:22:323:24:168:319:03
9:03
-0:08
40K
24.85 mi14:30:263:32:108:327:54
9:14
+0:11
25.2M
25.20 mi14:33:553:35:398:333:29
10:06
+0:52
Finish
26.22 mi14:43:133:44:578:359:18
9:08
-0:58

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

7:52 /mi

Average Pace

8:35 /mi

Slowest Pace

10:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:13:08

59% of race

Time at Steady Pace

1:05:49

29% of race

Time at Slower Pace

26:00

12% of race

Average Pace: 8:35 /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 mi11:22:4124:257:5224:25
7:52
#15350
10K
6.21 mi11:47:3249:167:5624:51
8:00
#15941
15K
9.32 mi12:12:471:14:318:0025:15
8:08
#16293
20K
12.43 mi12:38:371:40:218:0425:50
8:19
#16500
Half
13.11 mi12:44:061:45:508:045:29
8:02
#16480
25K
15.53 mi13:04:542:06:388:0920:48
8:35
#16658
30K
18.64 mi13:32:582:34:428:1828:04
9:02
#16836
20M
20.00 mi13:45:432:47:278:2212:45
9:23
#16968
21M
21.00 mi13:55:292:57:138:269:46
9:46
#16941
35K
21.75 mi14:01:593:03:438:276:30
8:41
#16918
23M
23.00 mi14:13:293:15:138:2911:30
9:11
#16937
24M
24.00 mi14:22:323:24:168:319:03
9:03
#16964
40K
24.85 mi14:30:263:32:108:327:54
9:14
#17001
25.2M
25.20 mi14:33:553:35:398:333:29
10:06
#17004
Finish
26.22 mi14:43:133:44:578:359:18
9:08
#17128
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi153504753475316939(Top 60%)5700(Top 47%)5700(Top 437%)
10K6.21 mi3.10 mi15941-5915102-3495102-34916490(Top 58%)5420(Top 44%)5420(Top 416%)
15K9.32 mi3.11 mi16293-3525308-2065308-20616939(Top 60%)5700(Top 47%)5700(Top 437%)
20K12.43 mi3.11 mi16500-2075434-1265434-12617023(Top 60%)5790(Top 47%)5790(Top 444%)
Half13.11 mi0.68 mi16480+205428+65428+616271(Top 57%)5358(Top 44%)5358(Top 411%)
25K15.53 mi2.42 mi16658-1785561-1335561-13317688(Top 62%)6244(Top 51%)6244(Top 479%)
30K18.64 mi3.11 mi16836-1785720-1595720-15917857(Top 63%)6506(Top 53%)6506(Top 499%)
20M20.00 mi1.36 mi16968-1325821-1015821-10118679(Top 66%)7090(Top 58%)7090(Top 544%)
21M21.00 mi1.00 mi16941+275842-215842-2117346(Top 61%)6448(Top 53%)6448(Top 495%)
35K21.75 mi0.75 mi16918+235848-65848-616642(Top 59%)6138(Top 50%)6138(Top 471%)
23M23.00 mi1.25 mi16937-195899-515899-5117275(Top 61%)6591(Top 54%)6591(Top 506%)
24M24.00 mi1.00 mi16964-275936-375936-3717623(Top 62%)6828(Top 56%)6828(Top 524%)
40K24.85 mi0.85 mi17001-375985-495985-4917547(Top 62%)6880(Top 56%)6880(Top 528%)
25.2M25.20 mi0.35 mi17004-36004-196004-1917500(Top 62%)6854(Top 56%)6854(Top 526%)
Finish26.22 mi1.02 mi17128-1246088-846088-8419636(Top 69%)7933(Top 65%)7933(Top 609%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

16939

Females

5700

F50-54

5700

5K→10K

3.1 - 6.2 mi

Top 58%
×5story building
+79ft-138ft

Overall

16490

Females

5420

F50-54

5420

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

16939

Females

5700

F50-54

5700

15K→20K

9.3 - 12.4 mi

Top 60%
×5story building
+106ft-86ft

Overall

17023

Females

5790

F50-54

5790

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

16271

Females

5358

F50-54

5358

Half→25K

13.1 - 15.5 mi

Top 62%
×4story building
+66ft-88ft

Overall

17688

Females

6244

F50-54

6244

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

17857

Females

6506

F50-54

6506

30K→20M

18.6 - 20.0 mi

Top 66%
×5story building
+64ft-50ft

Overall

18679

Females

7090

F50-54

7090

20M→21M

20.0 - 21.0 mi

Top 61%
×8story building
+106ft-24ft

Overall

17346

Females

6448

F50-54

6448

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

16642

Females

6138

F50-54

6138

35K→23M

21.8 - 23.0 mi

Top 61%
×5story building
+23ft-63ft

Overall

17275

Females

6591

F50-54

6591

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

17623

Females

6828

F50-54

6828

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

17547

Females

6880

F50-54

6880

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

17500

Females

6854

F50-54

6854

25.2M→Finish

25.2 - 26.2 mi

Top 69%
×2story building
+22ft-21ft

Overall

19636

Females

7933

F50-54

7933

Passing Analysis

Category:
Athletes Passed
1258
Passed By
3036
Net Change
-1778
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15350
5K → 10K126717-591#15350#15941
10K → 15K101453-352#15941#16293
15K → 20K145352-207#16293#16500
20K → Half4525+20#16500#16480
Half → 25K106284-178#16480#16658
25K → 30K163341-178#16658#16836
30K → 20M59191-132#16836#16968
20M → 21M130103+27#16968#16941
21M → 35K7350+23#16941#16918
35K → 23M109128-19#16918#16937
23M → 24M6693-27#16937#16964
24M → 40K63100-37#16964#17001
40K → 25.2M3639-3#17001#17004
25.2M → Finish36160-124#17004#17128
TOTALS12583036-1778
📊

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