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BOSTON MARATHON 2025

David Chambers

Bib: 5477•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 23%
Gender (Male)
#0 / 16105
Top 36%
Masters (Masters Men)
#0 / 10463
Top 22%
Division (M45-49)
#0 / 2386
Top 31%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:08
Rank: #3710
Start → 5K
20:08 | 6:29/mi
10K· 6.21 mi
40:29
Rank: #3893 (-183)
5K → 10K
20:21 | 6:33/mi
15K· 9.32 mi
1:00:55
Rank: #3932 (-39)
10K → 15K
20:26 | 6:35/mi
20K· 12.43 mi
1:21:56
Rank: #4115 (-183)
15K → 20K
21:01 | 6:46/mi
Half· 13.11 mi
1:26:27
Rank: #4126 (-11)
20K → Half
4:31 | 6:37/mi
25K· 15.53 mi
1:43:07
Rank: #4280 (-154)
Half → 25K
16:40 | 6:52/mi
30K· 18.64 mi
2:05:33
Rank: #4610 (-330)
25K → 30K
22:26 | 7:13/mi
20M
2:15:28
Rank: #4736 (-126)
30K → 20M
9:55 | 7:18/mi
21M
2:23:33
Rank: #4905 (-169)
20M → 21M
8:05 | 8:05/mi
35K· 21.75 mi
2:29:07
Rank: #5034 (-129)
21M → 35K
5:34 | 7:26/mi
23M
2:38:49
Rank: #5228 (-194)
35K → 23M
9:42 | 7:45/mi
24M
2:47:01
Rank: #5455 (-227)
23M → 24M
8:12 | 8:12/mi
40K· 24.85 mi
2:56:45
Rank: #6264 (-809)
24M → 40K
9:44 | 11:23/mi
25.2M
3:00:20
Rank: #6424 (-160)
40K → 25.2M
3:35 | 10:23/mi
Finish· 26.22 mi
3:08:33
Rank: #6640 (-216)
25.2M → Finish
8:13 | 8:04/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:27
Pace6:36 /mi
2nd Half
Distance13.11 mi
Time1:42:06
Pace7:47 /mi
📊Positive Split: 18.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:2120:086:2920:08
6:29
-
10K
6.21 mi10:43:4240:296:3120:21
6:33
+0:04
15K
9.32 mi11:04:081:00:556:3220:26
6:35
+0:02
20K
12.43 mi11:25:091:21:566:3621:01
6:46
+0:11
Half
13.11 mi11:29:401:26:276:364:31
6:37
-0:09
25K
15.53 mi11:46:201:43:076:3816:40
6:52
+0:15
30K
18.64 mi12:08:462:05:336:4422:26
7:13
+0:21
20M
20.00 mi12:18:412:15:286:469:55
7:18
+0:05
21M
21.00 mi12:26:462:23:336:508:05
8:05
+0:47
35K
21.75 mi12:32:202:29:076:515:34
7:26
-0:39
23M
23.00 mi12:42:022:38:496:549:42
7:45
+0:19
24M
24.00 mi12:50:142:47:016:588:12
8:12
+0:27
40K
24.85 mi12:59:582:56:457:079:44
11:23
+3:11
25.2M
25.20 mi13:03:333:00:207:093:35
10:23
-1:00
Finish
26.22 mi13:11:463:08:337:128:13
8:04
-2:19

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

6:29 /mi

Average Pace

7:12 /mi

Slowest Pace

11:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:00:55

32% of race

Time at Steady Pace

1:29:49

48% of race

Time at Slower Pace

37:49

20% of race

Average Pace: 7:11 /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 mi10:23:2120:086:2920:08
6:29
#3710
10K
6.21 mi10:43:4240:296:3120:21
6:33
#3893
15K
9.32 mi11:04:081:00:556:3220:26
6:35
#3932
20K
12.43 mi11:25:091:21:566:3621:01
6:46
#4115
Half
13.11 mi11:29:401:26:276:364:31
6:37
#4126
25K
15.53 mi11:46:201:43:076:3816:40
6:52
#4280
30K
18.64 mi12:08:462:05:336:4422:26
7:13
#4610
20M
20.00 mi12:18:412:15:286:469:55
7:18
#4736
21M
21.00 mi12:26:462:23:336:508:05
8:05
#4905
35K
21.75 mi12:32:202:29:076:515:34
7:26
#5034
23M
23.00 mi12:42:022:38:496:549:42
7:45
#5228
24M
24.00 mi12:50:142:47:016:588:12
8:12
#5455
40K
24.85 mi12:59:582:56:457:079:44
11:23
#6264
25.2M
25.20 mi13:03:333:00:207:093:35
10:23
#6424
Finish
26.22 mi13:11:463:08:337:128:13
8:04
#6640
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi3710351635164076(Top 14%)3838(Top 24%)3838(Top 161%)
10K6.21 mi3.10 mi3893-1833682-1663682-1664090(Top 14%)3848(Top 24%)3848(Top 161%)
15K9.32 mi3.11 mi3932-393707-253707-254076(Top 14%)3838(Top 24%)3838(Top 161%)
20K12.43 mi3.11 mi4115-1833871-1643871-1644963(Top 17%)4587(Top 28%)4587(Top 192%)
Half13.11 mi0.68 mi4126-113882-113882-114653(Top 16%)4346(Top 27%)4346(Top 182%)
25K15.53 mi2.42 mi4280-1544015-1334015-1335475(Top 19%)4979(Top 31%)4979(Top 209%)
30K18.64 mi3.11 mi4610-3304292-2774292-2776018(Top 21%)5319(Top 33%)5319(Top 223%)
20M20.00 mi1.36 mi4736-1264388-964388-965788(Top 20%)5049(Top 31%)5049(Top 212%)
21M21.00 mi1.00 mi4905-1694522-1344522-1347826(Top 28%)6155(Top 38%)6155(Top 258%)
35K21.75 mi0.75 mi5034-1294625-1034625-1038167(Top 29%)6390(Top 40%)6390(Top 268%)
23M23.00 mi1.25 mi5228-1944771-1464771-1468179(Top 29%)6263(Top 39%)6263(Top 262%)
24M24.00 mi1.00 mi5455-2274947-1764947-17612523(Top 44%)8418(Top 52%)8418(Top 353%)
40K24.85 mi0.85 mi6264-8095539-5925539-59223915(Top 84%)13724(Top 85%)13724(Top 575%)
25.2M25.20 mi0.35 mi6424-1605637-985637-9818539(Top 65%)11071(Top 69%)11071(Top 464%)
Finish26.22 mi1.02 mi6640-2165750-1135750-11313268(Top 47%)8634(Top 54%)8634(Top 362%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21stories
+97ft-345ft

Overall

4076

Males

3838

M45-49

3838

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

4090

Males

3848

M45-49

3848

10K→15K

6.2 - 9.3 mi

Top 14%
×3stories
+67ft-78ft

Overall

4076

Males

3838

M45-49

3838

15K→20K

9.3 - 12.4 mi

Top 17%
×5stories
+106ft-86ft

Overall

4963

Males

4587

M45-49

4587

20K→Half

12.4 - 13.1 mi

Top 16%
×2stories
+19ft-37ft

Overall

4653

Males

4346

M45-49

4346

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

5475

Males

4979

M45-49

4979

25K→30K

15.5 - 18.6 mi

Top 21%
×9stories
+181ft-148ft

Overall

6018

Males

5319

M45-49

5319

30K→20M

18.6 - 20.0 mi

Top 20%
×5stories
+64ft-50ft

Overall

5788

Males

5049

M45-49

5049

20M→21M

20.0 - 21.0 mi

Top 28%
×8stories
+106ft-24ft

Overall

7826

Males

6155

M45-49

6155

21M→35K

21.0 - 21.8 mi

Top 29%
×7stories
+17ft-86ft

Overall

8167

Males

6390

M45-49

6390

35K→23M

21.8 - 23.0 mi

Top 29%
×5stories
+23ft-63ft

Overall

8179

Males

6263

M45-49

6263

23M→24M

23.0 - 24.0 mi

Top 44%
×6stories
+12ft-82ft

Overall

12523

Males

8418

M45-49

8418

24M→40K

24.0 - 24.9 mi

Top 84%
×1story
+6ft-20ft

Overall

23915

Males

13724

M45-49

13724

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

18539

Males

11071

M45-49

11071

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2stories
+22ft-21ft

Overall

13268

Males

8634

M45-49

8634

Passing Analysis

Category:
Athletes Passed
510
Passed By
3440
Net Change
-2930
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3710
5K → 10K73256-183#3710#3893
10K → 15K84123-39#3893#3932
15K → 20K50233-183#3932#4115
20K → Half1728-11#4115#4126
Half → 25K46200-154#4126#4280
25K → 30K65395-330#4280#4610
30K → 20M37163-126#4610#4736
20M → 21M26195-169#4736#4905
21M → 35K26155-129#4905#5034
35K → 23M49243-194#5034#5228
23M → 24M9236-227#5228#5455
24M → 40K4813-809#5455#6264
40K → 25.2M3163-160#6264#6424
25.2M → Finish21237-216#6424#6640
TOTALS5103440-2930
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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