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BOSTON MARATHON 2025

David Welsh

Bib: 9097•M

AL

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 17%
Gender (Male)
#0 / 16105
Top 28%
Masters (Masters Men)
#0 / 10463
Top 14%
Division (M40-44)
#0 / 2247
Top 36%
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
6:32/mi
20:19
↑ 97↓ 3451.5%
10K· 6.21 mi
6:28/mi
40:25
↑ 79↓ 1380.4%
15K· 9.32 mi
6:32/mi
1:00:43
↑ 67↓ 78
20K· 12.43 mi
6:37/mi
1:21:17
↑ 106↓ 860.1%
Half· 13.11 mi
6:39/mi
1:25:49
↑ 19↓ 370.5%
25K· 15.53 mi
6:40/mi
1:41:58
↑ 66↓ 880.2%
30K· 18.64 mi
7:06/mi
2:04:01
↑ 181↓ 1480.2%
20M
7:19/mi
2:13:57
↑ 64↓ 500.2%
21M
7:56/mi
2:21:53
↑ 106↓ 241.6%
35K· 21.75 mi
7:22/mi
2:27:24
↑ 17↓ 861.7%
23M
7:29/mi
2:36:46
↑ 23↓ 630.6%
24M
7:30/mi
2:44:16
↓ 821.3%
40K· 24.85 mi
7:38/mi
2:50:48
↓ 200.3%
25.2M
8:16/mi
2:53:39
↑ 13↓ 160.2%
Finish· 26.22 mi
7:23/mi
3:01:10
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:49
Pace6:33 /mi
2nd Half
Distance13.11 mi
Time1:35:21
Pace7:16 /mi
📊Positive Split: 11.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:4920:196:3220:19
6:32
-
10K
6.21 mi11:05:5540:256:3020:06
6:28
-0:04
15K
9.32 mi11:26:131:00:436:3120:18
6:32
+0:04
20K
12.43 mi11:46:471:21:176:3220:34
6:37
+0:05
Half
13.11 mi11:51:191:25:496:334:32
6:39
+0:02
25K
15.53 mi12:07:281:41:586:3416:09
6:40
+0:01
30K
18.64 mi12:29:312:04:016:3922:03
7:06
+0:26
20M
20.00 mi12:39:272:13:576:429:56
7:19
+0:13
21M
21.00 mi12:47:232:21:536:457:56
7:56
+0:37
35K
21.75 mi12:52:542:27:246:475:31
7:22
-0:34
23M
23.00 mi13:02:162:36:466:499:22
7:29
+0:07
24M
24.00 mi13:09:462:44:166:517:30
7:30
+0:01
40K
24.85 mi13:16:182:50:486:526:32
7:38
+0:08
25.2M
25.20 mi13:19:092:53:396:532:51
8:16
+0:38
Finish
26.22 mi13:26:403:01:106:557:31
7:23
-0:53

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

6:28 /mi

Average Pace

6:55 /mi

Slowest Pace

8:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:41:58

56% of race

Time at Steady Pace

1:01:53

34% of race

Time at Slower Pace

17:19

10% of race

Average Pace: 6:55 /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 mi10:45:4920:196:3220:19
6:32
#4118
10K
6.21 mi11:05:5540:256:3020:06
6:28
#3810
15K
9.32 mi11:26:131:00:436:3120:18
6:32
#3794
20K
12.43 mi11:46:471:21:176:3220:34
6:37
#3768
Half
13.11 mi11:51:191:25:496:334:32
6:39
#3808
25K
15.53 mi12:07:281:41:586:3416:09
6:40
#3776
30K
18.64 mi12:29:312:04:016:3922:03
7:06
#3968
20M
20.00 mi12:39:272:13:576:429:56
7:19
#4092
21M
21.00 mi12:47:232:21:536:457:56
7:56
#4241
35K
21.75 mi12:52:542:27:246:475:31
7:22
#4384
23M
23.00 mi13:02:162:36:466:499:22
7:29
#4503
24M
24.00 mi13:09:462:44:166:517:30
7:30
#4671
40K
24.85 mi13:16:182:50:486:526:32
7:38
#4801
25.2M
25.20 mi13:19:092:53:396:532:51
8:16
#4846
Finish
26.22 mi13:26:403:01:106:557:31
7:23
#4950
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4118388238823774(Top 13%)3560(Top 22%)3560(Top 158%)
10K6.21 mi3.10 mi3810+3083603+2793603+2793511(Top 12%)3326(Top 21%)3326(Top 148%)
15K9.32 mi3.11 mi3794+163585+183585+183774(Top 13%)3560(Top 22%)3560(Top 158%)
20K12.43 mi3.11 mi3768+263556+293556+293825(Top 13%)3607(Top 22%)3607(Top 161%)
Half13.11 mi0.68 mi3808-403593-373593-374764(Top 17%)4424(Top 27%)4424(Top 197%)
25K15.53 mi2.42 mi3776+323561+323561+323862(Top 14%)3617(Top 22%)3617(Top 161%)
30K18.64 mi3.11 mi3968-1923730-1693730-1695289(Top 19%)4769(Top 30%)4769(Top 212%)
20M20.00 mi1.36 mi4092-1243831-1013831-1015820(Top 20%)5063(Top 31%)5063(Top 225%)
21M21.00 mi1.00 mi4241-1493952-1213952-1216939(Top 24%)5629(Top 35%)5629(Top 251%)
35K21.75 mi0.75 mi4384-1434067-1154067-1157648(Top 27%)6065(Top 38%)6065(Top 270%)
23M23.00 mi1.25 mi4503-1194159-924159-926499(Top 23%)5284(Top 33%)5284(Top 235%)
24M24.00 mi1.00 mi4671-1684294-1354294-1357630(Top 27%)5878(Top 36%)5878(Top 262%)
40K24.85 mi0.85 mi4801-1304399-1054399-1057646(Top 27%)5784(Top 36%)5784(Top 257%)
25.2M25.20 mi0.35 mi4846-454433-344433-347327(Top 26%)5492(Top 34%)5492(Top 244%)
Finish26.22 mi1.02 mi4950-1044508-754508-758274(Top 29%)6050(Top 38%)6050(Top 269%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21story building
+97ft-345ft

Overall

3774

Males

3560

M40-44

3560

5K→10K

3.1 - 6.2 mi

Top 12%
×5story building
+79ft-138ft

Overall

3511

Males

3326

M40-44

3326

10K→15K

6.2 - 9.3 mi

Top 13%
×3story building
+67ft-78ft

Overall

3774

Males

3560

M40-44

3560

15K→20K

9.3 - 12.4 mi

Top 13%
×5story building
+106ft-86ft

Overall

3825

Males

3607

M40-44

3607

20K→Half

12.4 - 13.1 mi

Top 17%
×2story building
+19ft-37ft

Overall

4764

Males

4424

M40-44

4424

Half→25K

13.1 - 15.5 mi

Top 14%
×4story building
+66ft-88ft

Overall

3862

Males

3617

M40-44

3617

25K→30K

15.5 - 18.6 mi

Top 19%
×9story building
+181ft-148ft

Overall

5289

Males

4769

M40-44

4769

30K→20M

18.6 - 20.0 mi

Top 20%
×5story building
+64ft-50ft

Overall

5820

Males

5063

M40-44

5063

20M→21M

20.0 - 21.0 mi

Top 24%
×8story building
+106ft-24ft

Overall

6939

Males

5629

M40-44

5629

21M→35K

21.0 - 21.8 mi

Top 27%
×7story building
+17ft-86ft

Overall

7648

Males

6065

M40-44

6065

35K→23M

21.8 - 23.0 mi

Top 23%
×5story building
+23ft-63ft

Overall

6499

Males

5284

M40-44

5284

23M→24M

23.0 - 24.0 mi

Top 27%
×6story building
+12ft-82ft

Overall

7630

Males

5878

M40-44

5878

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7646

Males

5784

M40-44

5784

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7327

Males

5492

M40-44

5492

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2story building
+22ft-21ft

Overall

8274

Males

6050

M40-44

6050

Passing Analysis

Category:
Athletes Passed
928
Passed By
1760
Net Change
-832
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4118
5K → 10K34638+308#4118#3810
10K → 15K10589+16#3810#3794
15K → 20K10680+26#3794#3768
20K → Half545-40#3768#3808
Half → 25K9260+32#3808#3776
25K → 30K63255-192#3776#3968
30K → 20M30154-124#3968#4092
20M → 21M31180-149#4092#4241
21M → 35K17160-143#4241#4384
35K → 23M45164-119#4384#4503
23M → 24M28196-168#4503#4671
24M → 40K29159-130#4671#4801
40K → 25.2M1358-45#4801#4846
25.2M → Finish18122-104#4846#4950
TOTALS9281760-832
📊

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