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BOSTON MARATHON 2025

Jin Yi

Bib: 8913 M CN

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 34%
Gender (Male)
#0 / 16105
Top 47%
Masters (Masters Men)
#0 / 10463
Top 35%
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
6:23/mi
19:51
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
6:38/mi
40:27
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
6:46/mi
1:01:28
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
6:52/mi
1:22:49
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
6:47/mi
1:27:27
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
6:54/mi
1:44:10
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:27/mi
2:07:18
↑ 181↓ 1480.2%
138 ft elev
20M
7:52/mi
2:18:00
↑ 64↓ 500.2%
148 ft elev
21M
9:06/mi
2:27:06
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:44/mi
2:32:53
↑ 17↓ 861.7%
156 ft elev
23M
13:48/mi
2:50:10
↑ 23↓ 630.6%
116 ft elev
24M
7:49/mi
2:57:59
↓ 821.3%
34 ft elev
40K· 24.85 mi
9:10/mi
3:05:49
↓ 200.3%
20 ft elev
25.2M
10:00/mi
3:09:16
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:39/mi
3:18:05
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:27
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:50:38
Pace8:26 /mi
📊Positive Split: 26.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:0619:516:2319:51
6:23
-
10K
6.21 mi11:05:4240:276:3120:36
6:38
+0:15
15K
9.32 mi11:26:431:01:286:3621:01
6:46
+0:08
20K
12.43 mi11:48:041:22:496:4021:21
6:52
+0:06
Half
13.11 mi11:52:421:27:276:404:38
6:47
-0:05
25K
15.53 mi12:09:251:44:106:4216:43
6:54
+0:07
30K
18.64 mi12:32:332:07:186:5023:08
7:27
+0:33
20M
20.00 mi12:43:152:18:006:5410:42
7:52
+0:25
21M
21.00 mi12:52:212:27:067:009:06
9:06
+1:14
35K
21.75 mi12:58:082:32:537:025:47
7:44
-1:22
23M
23.00 mi13:15:252:50:107:2417:17
13:48
+6:04
24M
24.00 mi13:23:142:57:597:257:49
7:49
-5:59
40K
24.85 mi13:31:043:05:497:297:50
9:10
+1:21
25.2M
25.20 mi13:34:313:09:167:313:27
10:00
+0:50
Finish
26.22 mi13:43:203:18:057:348:49
8:39
-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

6:23 /mi

Average Pace

7:34 /mi

Slowest Pace

13:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:06:06

33% of race

Time at Steady Pace

1:34:19

48% of race

Time at Slower Pace

37:40

19% of race

Average Pace: 7:33 /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 mi10:45:0619:516:2319:51
6:23
#3058
10K
6.21 mi11:05:4240:276:3120:36
6:38
#3859
15K
9.32 mi11:26:431:01:286:3621:01
6:46
#4362
20K
12.43 mi11:48:041:22:496:4021:21
6:52
#4685
Half
13.11 mi11:52:421:27:276:404:38
6:47
#4746
25K
15.53 mi12:09:251:44:106:4216:43
6:54
#4858
30K
18.64 mi12:32:332:07:186:5023:08
7:27
#5404
20M
20.00 mi12:43:152:18:006:5410:42
7:52
#5740
21M
21.00 mi12:52:212:27:067:009:06
9:06
#6123
35K
21.75 mi12:58:082:32:537:025:47
7:44
#6206
23M
23.00 mi13:15:252:50:107:2417:17
13:48
#8628
24M
24.00 mi13:23:142:57:597:257:49
7:49
#8666
40K
24.85 mi13:31:043:05:497:297:50
9:10
#9036
25.2M
25.20 mi13:34:313:09:167:313:27
10:00
#9181
Finish
26.22 mi13:43:203:18:057:348:49
8:39
#9542
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi3058290529055750(Top 20%)5245(Top 33%)5245(Top 220%)
10K6.21 mi3.10 mi3859-8013650-7453650-7454720(Top 17%)4420(Top 27%)4420(Top 185%)
15K9.32 mi3.11 mi4362-5034101-4514101-4515750(Top 20%)5245(Top 33%)5245(Top 220%)
20K12.43 mi3.11 mi4685-3234375-2744375-2745984(Top 21%)5427(Top 34%)5427(Top 227%)
Half13.11 mi0.68 mi4746-614428-534428-536140(Top 22%)5561(Top 35%)5561(Top 233%)
25K15.53 mi2.42 mi4858-1124518-904518-905649(Top 20%)5123(Top 32%)5123(Top 215%)
30K18.64 mi3.11 mi5404-5464957-4394957-4397356(Top 26%)6194(Top 38%)6194(Top 260%)
20M20.00 mi1.36 mi5740-3365223-2665223-2669515(Top 33%)7267(Top 45%)7267(Top 305%)
21M21.00 mi1.00 mi6123-3835499-2765499-27614058(Top 49%)9347(Top 58%)9347(Top 392%)
35K21.75 mi0.75 mi6206-835561-625561-6210254(Top 36%)7488(Top 46%)7488(Top 314%)
23M23.00 mi1.25 mi8628-24227128-15677128-156727156(Top 96%)15403(Top 96%)15403(Top 646%)
24M24.00 mi1.00 mi8666-387111+177111+179899(Top 35%)7108(Top 44%)7108(Top 298%)
40K24.85 mi0.85 mi9036-3707290-1797290-17917144(Top 60%)10434(Top 65%)10434(Top 437%)
25.2M25.20 mi0.35 mi9181-1457350-607350-6016955(Top 60%)10320(Top 64%)10320(Top 433%)
Finish26.22 mi1.02 mi9542-3617502-1527502-15217149(Top 60%)10459(Top 65%)10459(Top 438%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21story building
+97ft-345ft

Overall

5750

Males

5245

M45-49

5245

5K→10K

3.1 - 6.2 mi

Top 17%
×5story building
+79ft-138ft

Overall

4720

Males

4420

M45-49

4420

10K→15K

6.2 - 9.3 mi

Top 20%
×3story building
+67ft-78ft

Overall

5750

Males

5245

M45-49

5245

15K→20K

9.3 - 12.4 mi

Top 21%
×5story building
+106ft-86ft

Overall

5984

Males

5427

M45-49

5427

20K→Half

12.4 - 13.1 mi

Top 22%
×2story building
+19ft-37ft

Overall

6140

Males

5561

M45-49

5561

Half→25K

13.1 - 15.5 mi

Top 20%
×4story building
+66ft-88ft

Overall

5649

Males

5123

M45-49

5123

25K→30K

15.5 - 18.6 mi

Top 26%
×9story building
+181ft-148ft

Overall

7356

Males

6194

M45-49

6194

30K→20M

18.6 - 20.0 mi

Top 33%
×5story building
+64ft-50ft

Overall

9515

Males

7267

M45-49

7267

20M→21M

20.0 - 21.0 mi

Top 49%
×8story building
+106ft-24ft

Overall

14058

Males

9347

M45-49

9347

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

10254

Males

7488

M45-49

7488

35K→23M

21.8 - 23.0 mi

Top 96%
×5story building
+23ft-63ft

Overall

27156

Males

15403

M45-49

15403

23M→24M

23.0 - 24.0 mi

Top 35%
×6story building
+12ft-82ft

Overall

9899

Males

7108

M45-49

7108

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

17144

Males

10434

M45-49

10434

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

16955

Males

10320

M45-49

10320

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2story building
+22ft-21ft

Overall

17149

Males

10459

M45-49

10459

Passing Analysis

Category:
Athletes Passed
381
Passed By
6865
Net Change
-6484
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3058
5K → 10K3804-801#3058#3859
10K → 15K16519-503#3859#4362
15K → 20K48371-323#4362#4685
20K → Half970-61#4685#4746
Half → 25K74186-112#4746#4858
25K → 30K66612-546#4858#5404
30K → 20M13349-336#5404#5740
20M → 21M15398-383#5740#6123
21M → 35K19102-83#6123#6206
35K → 23M22424-2422#6206#8628
23M → 24M68106-38#8628#8666
24M → 40K24394-370#8666#9036
40K → 25.2M9154-145#9036#9181
25.2M → Finish15376-361#9181#9542
TOTALS3816865-6484
📊

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