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BOSTON MARATHON 2025

Colin Chandler

Bib: 5179•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 12%
Gender (Male)
#0 / 16105
Top 20%
Division (M18-39)
#0 / 5642
Top 43%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:53
Rank: #3122
Start → 5K
19:53 | 6:24/mi
10K· 6.21 mi
39:53
Rank: #3197 (-75)
5K → 10K
20:00 | 6:26/mi
15K· 9.32 mi
59:55
Rank: #3208 (-11)
10K → 15K
20:02 | 6:27/mi
20K· 12.43 mi
1:19:58
Rank: #3079 (+129)
15K → 20K
20:03 | 6:27/mi
Half· 13.11 mi
1:24:15
Rank: #3041 (+38)
20K → Half
4:17 | 6:17/mi
25K· 15.53 mi
1:39:55
Rank: #2949 (+92)
Half → 25K
15:40 | 6:28/mi
30K· 18.64 mi
2:00:58
Rank: #2968 (-19)
25K → 30K
21:03 | 6:47/mi
20M
2:10:29
Rank: #3017 (-49)
30K → 20M
9:31 | 7:00/mi
21M
2:18:01
Rank: #3076 (-59)
20M → 21M
7:32 | 7:32/mi
35K· 21.75 mi
2:23:05
Rank: #3070 (+6)
21M → 35K
5:04 | 6:46/mi
23M
2:32:00
Rank: #3099 (-29)
35K → 23M
8:55 | 7:07/mi
24M
2:38:57
Rank: #3117 (-18)
23M → 24M
6:57 | 6:57/mi
40K· 24.85 mi
2:45:10
Rank: #3160 (-43)
24M → 40K
6:13 | 7:16/mi
25.2M
2:48:01
Rank: #3216 (-56)
40K → 25.2M
2:51 | 8:16/mi
Finish· 26.22 mi
2:55:36
Rank: #3383 (-167)
25.2M → Finish
7:35 | 7:26/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:15
Pace6:26 /mi
2nd Half
Distance13.11 mi
Time1:31:21
Pace6:58 /mi
📊Positive Split: 8.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:1619:536:2419:53
6:24
-
10K
6.21 mi10:43:1639:536:2520:00
6:26
+0:02
15K
9.32 mi11:03:1859:556:2620:02
6:27
+0:01
20K
12.43 mi11:23:211:19:586:2620:03
6:27
0:00
Half
13.11 mi11:27:381:24:156:264:17
6:17
-0:10
25K
15.53 mi11:43:181:39:556:2615:40
6:28
+0:11
30K
18.64 mi12:04:212:00:586:2921:03
6:47
+0:19
20M
20.00 mi12:13:522:10:296:319:31
7:00
+0:13
21M
21.00 mi12:21:242:18:016:347:32
7:32
+0:32
35K
21.75 mi12:26:282:23:056:355:04
6:46
-0:46
23M
23.00 mi12:35:232:32:006:378:55
7:07
+0:21
24M
24.00 mi12:42:202:38:576:376:57
6:57
-0:10
40K
24.85 mi12:48:332:45:106:396:13
7:16
+0:19
25.2M
25.20 mi12:51:242:48:016:402:51
8:16
+1:00
Finish
26.22 mi12:58:592:55:366:427:35
7:26
-0:50

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

6:17 /mi

Average Pace

6:42 /mi

Slowest Pace

8:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:55

57% of race

Time at Steady Pace

42:35

24% of race

Time at Slower Pace

33:06

19% of race

Average Pace: 6:42 /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 mi10:23:1619:536:2419:53
6:24
#3122
10K
6.21 mi10:43:1639:536:2520:00
6:26
#3197
15K
9.32 mi11:03:1859:556:2620:02
6:27
#3208
20K
12.43 mi11:23:211:19:586:2620:03
6:27
#3079
Half
13.11 mi11:27:381:24:156:264:17
6:17
#3041
25K
15.53 mi11:43:181:39:556:2615:40
6:28
#2949
30K
18.64 mi12:04:212:00:586:2921:03
6:47
#2968
20M
20.00 mi12:13:522:10:296:319:31
7:00
#3017
21M
21.00 mi12:21:242:18:016:347:32
7:32
#3076
35K
21.75 mi12:26:282:23:056:355:04
6:46
#3070
23M
23.00 mi12:35:232:32:006:378:55
7:07
#3099
24M
24.00 mi12:42:202:38:576:376:57
6:57
#3117
40K
24.85 mi12:48:332:45:106:396:13
7:16
#3160
25.2M
25.20 mi12:51:242:48:016:402:51
8:16
#3216
Finish
26.22 mi12:58:592:55:366:427:35
7:26
#3383
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3122296629663248(Top 11%)3088(Top 19%)3088(Top 55%)
10K6.21 mi3.10 mi3197-753041-753041-753297(Top 12%)3134(Top 19%)3134(Top 56%)
15K9.32 mi3.11 mi3208-113050-93050-93248(Top 11%)3088(Top 19%)3088(Top 55%)
20K12.43 mi3.11 mi3079+1292936+1142936+1142848(Top 10%)2712(Top 17%)2712(Top 48%)
Half13.11 mi0.68 mi3041+382900+362900+362445(Top 9%)2342(Top 15%)2342(Top 42%)
25K15.53 mi2.42 mi2949+922811+892811+892691(Top 9%)2559(Top 16%)2559(Top 45%)
30K18.64 mi3.11 mi2968-192828-172828-173301(Top 12%)3089(Top 19%)3089(Top 55%)
20M20.00 mi1.36 mi3017-492866-382866-384129(Top 15%)3782(Top 23%)3782(Top 67%)
21M21.00 mi1.00 mi3076-592914-482914-484775(Top 17%)4209(Top 26%)4209(Top 75%)
35K21.75 mi0.75 mi3070+62907+72907+73951(Top 14%)3551(Top 22%)3551(Top 63%)
23M23.00 mi1.25 mi3099-292930-232930-234454(Top 16%)3921(Top 24%)3921(Top 69%)
24M24.00 mi1.00 mi3117-182942-122942-124357(Top 15%)3809(Top 24%)3809(Top 68%)
40K24.85 mi0.85 mi3160-432976-342976-345482(Top 19%)4542(Top 28%)4542(Top 81%)
25.2M25.20 mi0.35 mi3216-563028-523028-527375(Top 26%)5540(Top 34%)5540(Top 98%)
Finish26.22 mi1.02 mi3383-1673167-1393167-1398748(Top 31%)6302(Top 39%)6302(Top 112%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 11%
×21stories
+97ft-345ft

Overall

3248

Males

3088

M18-39

3088

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3297

Males

3134

M18-39

3134

10K→15K

6.2 - 9.3 mi

Top 11%
×3stories
+67ft-78ft

Overall

3248

Males

3088

M18-39

3088

15K→20K

9.3 - 12.4 mi

Top 10%
×5stories
+106ft-86ft

Overall

2848

Males

2712

M18-39

2712

20K→Half

12.4 - 13.1 mi

Top 9%
×2stories
+19ft-37ft

Overall

2445

Males

2342

M18-39

2342

Half→25K

13.1 - 15.5 mi

Top 9%
×4stories
+66ft-88ft

Overall

2691

Males

2559

M18-39

2559

25K→30K

15.5 - 18.6 mi

Top 12%
×9stories
+181ft-148ft

Overall

3301

Males

3089

M18-39

3089

30K→20M

18.6 - 20.0 mi

Top 15%
×5stories
+64ft-50ft

Overall

4129

Males

3782

M18-39

3782

20M→21M

20.0 - 21.0 mi

Top 17%
×8stories
+106ft-24ft

Overall

4775

Males

4209

M18-39

4209

21M→35K

21.0 - 21.8 mi

Top 14%
×7stories
+17ft-86ft

Overall

3951

Males

3551

M18-39

3551

35K→23M

21.8 - 23.0 mi

Top 16%
×5stories
+23ft-63ft

Overall

4454

Males

3921

M18-39

3921

23M→24M

23.0 - 24.0 mi

Top 15%
×6stories
+12ft-82ft

Overall

4357

Males

3809

M18-39

3809

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

5482

Males

4542

M18-39

4542

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7375

Males

5540

M18-39

5540

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2stories
+22ft-21ft

Overall

8748

Males

6302

M18-39

6302

Passing Analysis

Category:
Athletes Passed
854
Passed By
1115
Net Change
-261
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3122
5K → 10K103178-75#3122#3197
10K → 15K8798-11#3197#3208
15K → 20K15526+129#3208#3079
20K → Half413+38#3079#3041
Half → 25K11321+92#3041#2949
25K → 30K105124-19#2949#2968
30K → 20M4089-49#2968#3017
20M → 21M2483-59#3017#3076
21M → 35K4034+6#3076#3070
35K → 23M5180-29#3070#3099
23M → 24M4260-18#3099#3117
24M → 40K2972-43#3117#3160
40K → 25.2M1167-56#3160#3216
25.2M → Finish13180-167#3216#3383
TOTALS8541115-261
📊

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