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BOSTON MARATHON 2025

Serge Gasnier

Bib: 28815•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
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
7:48/mi
24:15
↑ 97↓ 3451.5%
10K· 6.21 mi
7:50/mi
48:34
↑ 79↓ 1380.4%
15K· 9.32 mi
7:58/mi
1:13:19
↑ 67↓ 78
20K· 12.43 mi
8:00/mi
1:38:11
↑ 106↓ 860.1%
Half· 13.11 mi
7:50/mi
1:43:32
↑ 19↓ 370.5%
25K· 15.53 mi
8:15/mi
2:03:33
↑ 66↓ 880.2%
30K· 18.64 mi
8:46/mi
2:30:48
↑ 181↓ 1480.2%
20M
9:21/mi
2:43:31
↑ 64↓ 500.2%
21M
10:18/mi
2:53:49
↑ 106↓ 241.6%
35K· 21.75 mi
8:15/mi
2:59:59
↑ 17↓ 861.7%
23M
9:29/mi
3:11:51
↑ 23↓ 630.6%
24M
8:34/mi
3:20:25
↓ 821.3%
40K· 24.85 mi
9:12/mi
3:28:17
↓ 200.3%
25.2M
10:06/mi
3:31:46
↑ 13↓ 160.2%
Finish· 26.22 mi
8:14/mi
3:40:09
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:32
Pace7:54 /mi
2nd Half
Distance13.11 mi
Time1:56:37
Pace8:54 /mi
📊Positive Split: 12.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:41:5924:157:4824:15
7:48
-
10K
6.21 mi12:06:1848:347:4924:19
7:50
+0:02
15K
9.32 mi12:31:031:13:197:5224:45
7:58
+0:08
20K
12.43 mi12:55:551:38:117:5424:52
8:00
+0:02
Half
13.11 mi13:01:161:43:327:545:21
7:50
-0:10
25K
15.53 mi13:21:172:03:337:5720:01
8:15
+0:25
30K
18.64 mi13:48:322:30:488:0527:15
8:46
+0:31
20M
20.00 mi14:01:152:43:318:1112:43
9:21
+0:35
21M
21.00 mi14:11:332:53:498:1710:18
10:18
+0:57
35K
21.75 mi14:17:432:59:598:176:10
8:15
-2:03
23M
23.00 mi14:29:353:11:518:2011:52
9:29
+1:14
24M
24.00 mi14:38:093:20:258:218:34
8:34
-0:55
40K
24.85 mi14:46:013:28:178:237:52
9:12
+0:38
25.2M
25.20 mi14:49:303:31:468:243:29
10:06
+0:54
Finish
26.22 mi14:57:533:40:098:248:23
8:14
-1:52

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

7:48 /mi

Average Pace

8:24 /mi

Slowest Pace

10:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

53:55

24% of race

Time at Steady Pace

1:32:45

42% of race

Time at Slower Pace

1:13:29

33% of race

Average Pace: 8:24 /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 mi11:41:5924:157:4824:15
7:48
#14854
10K
6.21 mi12:06:1848:347:4924:19
7:50
#14909
15K
9.32 mi12:31:031:13:197:5224:45
7:58
#15211
20K
12.43 mi12:55:551:38:117:5424:52
8:00
#15103
Half
13.11 mi13:01:161:43:327:545:21
7:50
#15069
25K
15.53 mi13:21:172:03:337:5720:01
8:15
#15182
30K
18.64 mi13:48:322:30:488:0527:15
8:46
#15431
20M
20.00 mi14:01:152:43:318:1112:43
9:21
#15669
21M
21.00 mi14:11:332:53:498:1710:18
10:18
#15928
35K
21.75 mi14:17:432:59:598:176:10
8:15
#15794
23M
23.00 mi14:29:353:11:518:2011:52
9:29
#15963
24M
24.00 mi14:38:093:20:258:218:34
8:34
#15907
40K
24.85 mi14:46:013:28:178:237:52
9:12
#15944
25.2M
25.20 mi14:49:303:31:468:243:29
10:06
#15973
Finish
26.22 mi14:57:533:40:098:248:23
8:14
#15907
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi14854103751037515782(Top 56%)10709(Top 66%)10709(Top 449%)
10K6.21 mi3.10 mi14909-5510366+910366+915056(Top 53%)10447(Top 65%)10447(Top 438%)
15K9.32 mi3.11 mi15211-30210484-11810484-11815782(Top 56%)10709(Top 66%)10709(Top 449%)
20K12.43 mi3.11 mi15103+10810424+6010424+6014957(Top 53%)10294(Top 64%)10294(Top 431%)
Half13.11 mi0.68 mi15069+3410405+1910405+1914578(Top 51%)10159(Top 63%)10159(Top 426%)
25K15.53 mi2.42 mi15182-11310425-2010425-2015637(Top 55%)10503(Top 65%)10503(Top 440%)
30K18.64 mi3.11 mi15431-24910480-5510480-5516421(Top 58%)10674(Top 66%)10674(Top 447%)
20M20.00 mi1.36 mi15669-23810545-6510545-6518536(Top 65%)11461(Top 71%)11461(Top 480%)
21M21.00 mi1.00 mi15928-25910618-7310618-7319349(Top 68%)11763(Top 73%)11763(Top 493%)
35K21.75 mi0.75 mi15794+13410543+7510543+7513889(Top 49%)9240(Top 57%)9240(Top 387%)
23M23.00 mi1.25 mi15963-16910570-2710570-2718563(Top 65%)11243(Top 70%)11243(Top 471%)
24M24.00 mi1.00 mi15907+5610540+3010540+3014920(Top 53%)9547(Top 59%)9547(Top 400%)
40K24.85 mi0.85 mi15944-3710531+910531+917323(Top 61%)10516(Top 65%)10516(Top 441%)
25.2M25.20 mi0.35 mi15973-2910529+210529+217414(Top 61%)10554(Top 66%)10554(Top 442%)
Finish26.22 mi1.02 mi15907+6610482+4710482+4714438(Top 51%)9232(Top 57%)9232(Top 387%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

15782

Males

10709

M45-49

10709

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

15056

Males

10447

M45-49

10447

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

15782

Males

10709

M45-49

10709

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

14957

Males

10294

M45-49

10294

20K→Half

12.4 - 13.1 mi

Top 51%
×2story building
+19ft-37ft

Overall

14578

Males

10159

M45-49

10159

Half→25K

13.1 - 15.5 mi

Top 55%
×4story building
+66ft-88ft

Overall

15637

Males

10503

M45-49

10503

25K→30K

15.5 - 18.6 mi

Top 58%
×9story building
+181ft-148ft

Overall

16421

Males

10674

M45-49

10674

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

18536

Males

11461

M45-49

11461

20M→21M

20.0 - 21.0 mi

Top 68%
×8story building
+106ft-24ft

Overall

19349

Males

11763

M45-49

11763

21M→35K

21.0 - 21.8 mi

Top 49%
×7story building
+17ft-86ft

Overall

13889

Males

9240

M45-49

9240

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

18563

Males

11243

M45-49

11243

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

14920

Males

9547

M45-49

9547

24M→40K

24.0 - 24.9 mi

Top 61%
×1story
+6ft-20ft

Overall

17323

Males

10516

M45-49

10516

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

17414

Males

10554

M45-49

10554

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2story building
+22ft-21ft

Overall

14438

Males

9232

M45-49

9232

Passing Analysis

Category:
Athletes Passed
1631
Passed By
2684
Net Change
-1053
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14854
5K → 10K262317-55#14854#14909
10K → 15K118420-302#14909#15211
15K → 20K263155+108#15211#15103
20K → Half5824+34#15103#15069
Half → 25K140253-113#15069#15182
25K → 30K164413-249#15182#15431
30K → 20M72310-238#15431#15669
20M → 21M52311-259#15669#15928
21M → 35K14410+134#15928#15794
35K → 23M71240-169#15794#15963
23M → 24M9438+56#15963#15907
24M → 40K6097-37#15907#15944
40K → 25.2M2453-29#15944#15973
25.2M → Finish10943+66#15973#15907
TOTALS16312684-1053
📊

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