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BOSTON MARATHON 2025

Tongtong Li

Bib: 18021 M CN

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
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
8:02/mi
24:59
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:16/mi
50:39
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:21/mi
1:16:36
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:59/mi
1:44:31
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:27/mi
1:50:17
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:35/mi
2:11:06
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
9:04/mi
2:39:17
↑ 181↓ 1480.2%
138 ft elev
20M
9:15/mi
2:51:51
↑ 64↓ 500.2%
148 ft elev
21M
9:46/mi
3:01:37
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:44/mi
3:08:09
↑ 17↓ 861.7%
156 ft elev
23M
9:55/mi
3:20:34
↑ 23↓ 630.6%
116 ft elev
24M
9:01/mi
3:29:35
↓ 821.3%
34 ft elev
40K· 24.85 mi
9:09/mi
3:37:24
↓ 200.3%
20 ft elev
25.2M
10:12/mi
3:40:55
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:38/mi
3:49:43
↑ 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
Time1:50:17
Pace8:25 /mi
2nd Half
Distance13.11 mi
Time1:59:26
Pace9:07 /mi
📊Positive Split: 8.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:1724:598:0224:59
8:02
-
10K
6.21 mi11:40:5750:398:0925:40
8:16
+0:14
15K
9.32 mi12:06:541:16:368:1325:57
8:21
+0:05
20K
12.43 mi12:34:491:44:318:2527:55
8:59
+0:38
Half
13.11 mi12:40:351:50:178:255:46
8:27
-0:32
25K
15.53 mi13:01:242:11:068:2620:49
8:35
+0:08
30K
18.64 mi13:29:352:39:178:3328:11
9:04
+0:29
20M
20.00 mi13:42:092:51:518:3612:34
9:15
+0:11
21M
21.00 mi13:51:553:01:378:399:46
9:46
+0:31
35K
21.75 mi13:58:273:08:098:396:32
8:44
-1:02
23M
23.00 mi14:10:523:20:348:4312:25
9:55
+1:11
24M
24.00 mi14:19:533:29:358:449:01
9:01
-0:54
40K
24.85 mi14:27:423:37:248:457:49
9:09
+0:08
25.2M
25.20 mi14:31:133:40:558:463:31
10:12
+1:03
Finish
26.22 mi14:40:013:49:438:468:48
8:38
-1:34

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

8:02 /mi

Average Pace

8:46 /mi

Slowest Pace

10:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:51:59

49% of race

Time at Steady Pace

1:32:02

40% of race

Time at Slower Pace

25:42

11% of race

Average Pace: 8:46 /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 mi11:15:1724:598:0224:59
8:02
#16911
10K
6.21 mi11:40:5750:398:0925:40
8:16
#17642
15K
9.32 mi12:06:541:16:368:1325:57
8:21
#17876
20K
12.43 mi12:34:491:44:318:2527:55
8:59
#18718
Half
13.11 mi12:40:351:50:178:255:46
8:27
#18721
25K
15.53 mi13:01:242:11:068:2620:49
8:35
#18528
30K
18.64 mi13:29:352:39:178:3328:11
9:04
#18410
20M
20.00 mi13:42:092:51:518:3612:34
9:15
#18387
21M
21.00 mi13:51:553:01:378:399:46
9:46
#18292
35K
21.75 mi13:58:273:08:098:396:32
8:44
#18229
23M
23.00 mi14:10:523:20:348:4312:25
9:55
#18396
24M
24.00 mi14:19:533:29:358:449:01
9:01
#18343
40K
24.85 mi14:27:423:37:248:457:49
9:09
#18297
25.2M
25.20 mi14:31:133:40:558:463:31
10:12
#18287
Finish
26.22 mi14:40:013:49:438:468:48
8:38
#18255
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi16911111731117318386(Top 65%)11787(Top 73%)11787(Top 715%)
10K6.21 mi3.10 mi17642-73111472-29911472-29918290(Top 64%)11757(Top 73%)11757(Top 713%)
15K9.32 mi3.11 mi17876-23411574-10211574-10218386(Top 65%)11787(Top 73%)11787(Top 715%)
20K12.43 mi3.11 mi18718-84211920-34611920-34620873(Top 73%)12831(Top 80%)12831(Top 779%)
Half13.11 mi0.68 mi18721-311922-211922-218851(Top 66%)11976(Top 74%)11976(Top 727%)
25K15.53 mi2.42 mi18528+19311819+10311819+10317713(Top 62%)11410(Top 71%)11410(Top 692%)
30K18.64 mi3.11 mi18410+11811749+7011749+7018029(Top 63%)11394(Top 71%)11394(Top 691%)
20M20.00 mi1.36 mi18387+2311703+4611703+4618014(Top 63%)11243(Top 70%)11243(Top 682%)
21M21.00 mi1.00 mi18292+9511635+6811635+6817322(Top 61%)10838(Top 67%)10838(Top 658%)
35K21.75 mi0.75 mi18229+6311589+4611589+4616874(Top 59%)10570(Top 66%)10570(Top 641%)
23M23.00 mi1.25 mi18396-16711642-5311642-5320216(Top 71%)12005(Top 75%)12005(Top 728%)
24M24.00 mi1.00 mi18343+5311585+5711585+5717437(Top 61%)10668(Top 66%)10668(Top 647%)
40K24.85 mi0.85 mi18297+4611535+5011535+5017072(Top 60%)10413(Top 65%)10413(Top 632%)
25.2M25.20 mi0.35 mi18287+1011518+1711518+1717848(Top 63%)10750(Top 67%)10750(Top 652%)
Finish26.22 mi1.02 mi18255+3211487+3111487+3117060(Top 60%)10425(Top 65%)10425(Top 633%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

18386

Males

11787

M55-59

11787

5K→10K

3.1 - 6.2 mi

Top 64%
×5story building
+79ft-138ft

Overall

18290

Males

11757

M55-59

11757

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

18386

Males

11787

M55-59

11787

15K→20K

9.3 - 12.4 mi

Top 73%
×5story building
+106ft-86ft

Overall

20873

Males

12831

M55-59

12831

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

18851

Males

11976

M55-59

11976

Half→25K

13.1 - 15.5 mi

Top 62%
×4story building
+66ft-88ft

Overall

17713

Males

11410

M55-59

11410

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

18029

Males

11394

M55-59

11394

30K→20M

18.6 - 20.0 mi

Top 63%
×5story building
+64ft-50ft

Overall

18014

Males

11243

M55-59

11243

20M→21M

20.0 - 21.0 mi

Top 61%
×8story building
+106ft-24ft

Overall

17322

Males

10838

M55-59

10838

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

16874

Males

10570

M55-59

10570

35K→23M

21.8 - 23.0 mi

Top 71%
×5story building
+23ft-63ft

Overall

20216

Males

12005

M55-59

12005

23M→24M

23.0 - 24.0 mi

Top 61%
×6story building
+12ft-82ft

Overall

17437

Males

10668

M55-59

10668

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

17072

Males

10413

M55-59

10413

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

17848

Males

10750

M55-59

10750

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2story building
+22ft-21ft

Overall

17060

Males

10425

M55-59

10425

Passing Analysis

Category:
Athletes Passed
1559
Passed By
2903
Net Change
-1344
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16911
5K → 10K91822-731#16911#17642
10K → 15K118352-234#17642#17876
15K → 20K45887-842#17876#18718
20K → Half4144-3#18718#18721
Half → 25K25057+193#18721#18528
25K → 30K296178+118#18528#18410
30K → 20M11895+23#18410#18387
20M → 21M14954+95#18387#18292
21M → 35K8724+63#18292#18229
35K → 23M65232-167#18229#18396
23M → 24M9946+53#18396#18343
24M → 40K9347+46#18343#18297
40K → 25.2M3525+10#18297#18287
25.2M → Finish7240+32#18287#18255
TOTALS15592903-1344
📊

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