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BOSTON MARATHON 2025

Christopher Lang

Bib: 31721•M

NY

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
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
8:06/mi
25:09
↑ 97↓ 3451.5%
10K· 6.21 mi
7:43/mi
49:06
↑ 79↓ 1380.4%
15K· 9.32 mi
7:38/mi
1:12:50
↑ 67↓ 78
20K· 12.43 mi
7:46/mi
1:36:59
↑ 106↓ 860.1%
Half· 13.11 mi
7:40/mi
1:42:13
↑ 19↓ 370.5%
25K· 15.53 mi
8:36/mi
2:03:03
↑ 66↓ 880.2%
30K· 18.64 mi
9:05/mi
2:31:17
↑ 181↓ 1480.2%
20M
9:15/mi
2:43:51
↑ 64↓ 500.2%
21M
9:32/mi
2:53:23
↑ 106↓ 241.6%
35K· 21.75 mi
9:00/mi
3:00:07
↑ 17↓ 861.7%
23M
8:54/mi
3:11:16
↑ 23↓ 630.6%
24M
8:54/mi
3:20:10
↓ 821.3%
40K· 24.85 mi
9:02/mi
3:27:53
↓ 200.3%
25.2M
10:47/mi
3:31:36
↑ 13↓ 160.2%
Finish· 26.22 mi
8:43/mi
3:40:29
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:13
Pace7:48 /mi
2nd Half
Distance13.11 mi
Time1:58:16
Pace9:01 /mi
📊Positive Split: 15.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:3825:098:0625:09
8:06
-
10K
6.21 mi12:14:3549:067:5423:57
7:43
-0:23
15K
9.32 mi12:38:191:12:507:4923:44
7:38
-0:05
20K
12.43 mi13:02:281:36:597:4824:09
7:46
+0:08
Half
13.11 mi13:07:421:42:137:485:14
7:40
-0:06
25K
15.53 mi13:28:322:03:037:5520:50
8:36
+0:56
30K
18.64 mi13:56:462:31:178:0728:14
9:05
+0:29
20M
20.00 mi14:09:202:43:518:1212:34
9:15
+0:10
21M
21.00 mi14:18:522:53:238:159:32
9:32
+0:17
35K
21.75 mi14:25:363:00:078:176:44
9:00
-0:32
23M
23.00 mi14:36:453:11:168:1911:09
8:54
-0:06
24M
24.00 mi14:45:393:20:108:208:54
8:54
0:00
40K
24.85 mi14:53:223:27:538:227:43
9:02
+0:08
25.2M
25.20 mi14:57:053:31:368:243:43
10:47
+1:45
Finish
26.22 mi15:05:583:40:298:258:53
8:43
-2:04

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

7:38 /mi

Average Pace

8:25 /mi

Slowest Pace

10:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:13

46% of race

Time at Steady Pace

1:45:01

48% of race

Time at Slower Pace

13:15

6% of race

Average Pace: 8:25 /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 mi11:50:3825:098:0625:09
8:06
#17305
10K
6.21 mi12:14:3549:067:5423:57
7:43
#15683
15K
9.32 mi12:38:191:12:507:4923:44
7:38
#14753
20K
12.43 mi13:02:281:36:597:4824:09
7:46
#14275
Half
13.11 mi13:07:421:42:137:485:14
7:40
#14224
25K
15.53 mi13:28:322:03:037:5520:50
8:36
#14912
30K
18.64 mi13:56:462:31:178:0728:14
9:05
#15627
20M
20.00 mi14:09:202:43:518:1212:34
9:15
#15803
21M
21.00 mi14:18:522:53:238:159:32
9:32
#15794
35K
21.75 mi14:25:363:00:078:176:44
9:00
#15840
23M
23.00 mi14:36:453:11:168:1911:09
8:54
#15785
24M
24.00 mi14:45:393:20:108:208:54
8:54
#15833
40K
24.85 mi14:53:223:27:538:227:43
9:02
#15841
25.2M
25.20 mi14:57:053:31:368:243:43
10:47
#15925
Finish
26.22 mi15:05:583:40:298:258:53
8:43
#15993
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi17305113321133212946(Top 46%)9494(Top 59%)9494(Top 168%)
10K6.21 mi3.10 mi15683+162210693+63910693+63913965(Top 49%)9986(Top 62%)9986(Top 177%)
15K9.32 mi3.11 mi14753+93010307+38610307+38612946(Top 46%)9494(Top 59%)9494(Top 168%)
20K12.43 mi3.11 mi14275+47810072+23510072+23513046(Top 46%)9439(Top 59%)9439(Top 167%)
Half13.11 mi0.68 mi14224+5110047+2510047+2513151(Top 46%)9550(Top 59%)9550(Top 169%)
25K15.53 mi2.42 mi14912-68810293-24610293-24617752(Top 62%)11420(Top 71%)11420(Top 202%)
30K18.64 mi3.11 mi15627-71510573-28010573-28018118(Top 64%)11422(Top 71%)11422(Top 202%)
20M20.00 mi1.36 mi15803-17610605-3210605-3218004(Top 63%)11233(Top 70%)11233(Top 199%)
21M21.00 mi1.00 mi15794+910560+4510560+4516206(Top 57%)10341(Top 64%)10341(Top 183%)
35K21.75 mi0.75 mi15840-4610566-610566-618196(Top 64%)11132(Top 69%)11132(Top 197%)
23M23.00 mi1.25 mi15785+5510499+6710499+6715694(Top 55%)9938(Top 62%)9938(Top 176%)
24M24.00 mi1.00 mi15833-4810506-710506-716833(Top 59%)10388(Top 65%)10388(Top 184%)
40K24.85 mi0.85 mi15841-810487+1910487+1916430(Top 58%)10113(Top 63%)10113(Top 179%)
25.2M25.20 mi0.35 mi15925-8410505-1810505-1819919(Top 70%)11741(Top 73%)11741(Top 208%)
Finish26.22 mi1.02 mi15993-6810525-2010525-2017551(Top 62%)10654(Top 66%)10654(Top 189%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 46%
×21story building
+97ft-345ft

Overall

12946

Males

9494

M18-39

9494

5K→10K

3.1 - 6.2 mi

Top 49%
×5story building
+79ft-138ft

Overall

13965

Males

9986

M18-39

9986

10K→15K

6.2 - 9.3 mi

Top 46%
×3story building
+67ft-78ft

Overall

12946

Males

9494

M18-39

9494

15K→20K

9.3 - 12.4 mi

Top 46%
×5story building
+106ft-86ft

Overall

13046

Males

9439

M18-39

9439

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

13151

Males

9550

M18-39

9550

Half→25K

13.1 - 15.5 mi

Top 62%
×4story building
+66ft-88ft

Overall

17752

Males

11420

M18-39

11420

25K→30K

15.5 - 18.6 mi

Top 64%
×9story building
+181ft-148ft

Overall

18118

Males

11422

M18-39

11422

30K→20M

18.6 - 20.0 mi

Top 63%
×5story building
+64ft-50ft

Overall

18004

Males

11233

M18-39

11233

20M→21M

20.0 - 21.0 mi

Top 57%
×8story building
+106ft-24ft

Overall

16206

Males

10341

M18-39

10341

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

18196

Males

11132

M18-39

11132

35K→23M

21.8 - 23.0 mi

Top 55%
×5story building
+23ft-63ft

Overall

15694

Males

9938

M18-39

9938

23M→24M

23.0 - 24.0 mi

Top 59%
×6story building
+12ft-82ft

Overall

16833

Males

10388

M18-39

10388

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

16430

Males

10113

M18-39

10113

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

19919

Males

11741

M18-39

11741

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

17551

Males

10654

M18-39

10654

Passing Analysis

Category:
Athletes Passed
3864
Passed By
2552
Net Change
+1312
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17305
5K → 10K164422+1622#17305#15683
10K → 15K9344+930#15683#14753
15K → 20K50830+478#14753#14275
20K → Half6211+51#14275#14224
Half → 25K52740-688#14224#14912
25K → 30K92807-715#14912#15627
30K → 20M77253-176#15627#15803
20M → 21M118109+9#15803#15794
21M → 35K55101-46#15794#15840
35K → 23M13479+55#15840#15785
23M → 24M52100-48#15785#15833
24M → 40K7684-8#15833#15841
40K → 25.2M18102-84#15841#15925
25.2M → Finish42110-68#15925#15993
TOTALS38642552+1312
📊

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