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BOSTON MARATHON 2025

Charlie Greifenkamp

Bib: 27227•M

IL

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

Start
0:00:00
Race begins
5K· 3.11 mi
29:53
Rank: #24593
Start → 5K
9:37/mi
29:53 split
10K· 6.21 mi
57:59
Rank: #23655 (+938)
5K → 10K
9:03/mi
28:06 split
15K· 9.32 mi
1:25:46
Rank: #23118 (+537)
10K → 15K
8:57/mi
27:47 split
20K· 12.43 mi
1:53:43
Rank: #22581 (+537)
15K → 20K
9:00/mi
27:57 split
Half· 13.11 mi
1:59:50
Rank: #22526 (+55)
20K → Half
8:58/mi
6:07 split
25K· 15.53 mi
2:21:36
Rank: #22068 (+458)
Half → 25K
8:59/mi
21:46 split
30K· 18.64 mi
2:50:19
Rank: #21474 (+594)
25K → 30K
9:15/mi
28:43 split
20M
3:03:07
Rank: #21267 (+207)
30K → 20M
9:25/mi
12:48 split
21M
3:12:42
Rank: #21001 (+266)
20M → 21M
9:35/mi
9:35 split
35K· 21.75 mi
3:19:38
Rank: #20939 (+62)
21M → 35K
9:16/mi
6:56 split
23M
3:31:23
Rank: #20784 (+155)
35K → 23M
9:23/mi
11:45 split
24M
3:40:48
Rank: #20730 (+54)
23M → 24M
9:25/mi
9:25 split
40K· 24.85 mi
3:49:27
Rank: #20747 (-17)
24M → 40K
10:07/mi
8:39 split
25.2M
3:52:58
Rank: #20706 (+41)
40K → 25.2M
10:12/mi
3:31 split
Finish· 26.22 mi
4:02:51
Rank: #20747 (-41)
25.2M → Finish
9:42/mi
9:53 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:50
Pace9:08 /mi
2nd Half
Distance13.11 mi
Time2:03:01
Pace9:23 /mi
📊Positive Split: 2.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:3529:539:3729:53
9:37
-
10K
6.21 mi12:14:4157:599:2028:06
9:03
-0:34
15K
9.32 mi12:42:281:25:469:1227:47
8:57
-0:06
20K
12.43 mi13:10:251:53:439:0927:57
9:00
+0:03
Half
13.11 mi13:16:321:59:509:086:07
8:58
-0:02
25K
15.53 mi13:38:182:21:369:0721:46
8:59
+0:01
30K
18.64 mi14:07:012:50:199:0828:43
9:15
+0:16
20M
20.00 mi14:19:493:03:079:0912:48
9:25
+0:10
21M
21.00 mi14:29:243:12:429:119:35
9:35
+0:10
35K
21.75 mi14:36:203:19:389:116:56
9:16
-0:19
23M
23.00 mi14:48:053:31:239:1111:45
9:23
+0:07
24M
24.00 mi14:57:303:40:489:129:25
9:25
+0:02
40K
24.85 mi15:06:093:49:279:148:39
10:07
+0:42
25.2M
25.20 mi15:09:403:52:589:153:31
10:12
+0:05
Finish
26.22 mi15:19:334:02:519:169:53
9:42
-0:30

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

8:57 /mi

Average Pace

9:16 /mi

Slowest Pace

10:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:50:41

95% of race

Time at Steady Pace

12:10

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:16 /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 mi11:46:3529:539:3729:53
9:37
#24593
10K
6.21 mi12:14:4157:599:2028:06
9:03
#23655
15K
9.32 mi12:42:281:25:469:1227:47
8:57
#23118
20K
12.43 mi13:10:251:53:439:0927:57
9:00
#22581
Half
13.11 mi13:16:321:59:509:086:07
8:58
#22526
25K
15.53 mi13:38:182:21:369:0721:46
8:59
#22068
30K
18.64 mi14:07:012:50:199:0828:43
9:15
#21474
20M
20.00 mi14:19:493:03:079:0912:48
9:25
#21267
21M
21.00 mi14:29:243:12:429:119:35
9:35
#21001
35K
21.75 mi14:36:203:19:389:116:56
9:16
#20939
23M
23.00 mi14:48:053:31:239:1111:45
9:23
#20784
24M
24.00 mi14:57:303:40:489:129:25
9:25
#20730
40K
24.85 mi15:06:093:49:279:148:39
10:07
#20747
25.2M
25.20 mi15:09:403:52:589:153:31
10:12
#20706
Finish
26.22 mi15:19:334:02:519:169:53
9:42
#20747
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi24593145241452421760(Top 77%)13289(Top 83%)13289(Top 236%)
10K6.21 mi3.10 mi23655+93814079+44514079+44522568(Top 79%)13601(Top 84%)13601(Top 241%)
15K9.32 mi3.11 mi23118+53713861+21813861+21821760(Top 77%)13289(Top 83%)13289(Top 236%)
20K12.43 mi3.11 mi22581+53713622+23913622+23920942(Top 74%)12865(Top 80%)12865(Top 228%)
Half13.11 mi0.68 mi22526+5513587+3513587+3521643(Top 76%)13183(Top 82%)13183(Top 234%)
25K15.53 mi2.42 mi22068+45813366+22113366+22119789(Top 70%)12326(Top 77%)12326(Top 218%)
30K18.64 mi3.11 mi21474+59413068+29813068+29818858(Top 66%)11769(Top 73%)11769(Top 209%)
20M20.00 mi1.36 mi21267+20712954+11412954+11418823(Top 66%)11605(Top 72%)11605(Top 206%)
21M21.00 mi1.00 mi21001+26612826+12812826+12816457(Top 58%)10465(Top 65%)10465(Top 185%)
35K21.75 mi0.75 mi20939+6212786+4012786+4019445(Top 68%)11712(Top 73%)11712(Top 208%)
23M23.00 mi1.25 mi20784+15512685+10112685+10118167(Top 64%)11062(Top 69%)11062(Top 196%)
24M24.00 mi1.00 mi20730+5412646+3912646+3919299(Top 68%)11553(Top 72%)11553(Top 205%)
40K24.85 mi0.85 mi20747-1712635+1112635+1120822(Top 73%)12198(Top 76%)12198(Top 216%)
25.2M25.20 mi0.35 mi20706+4112610+2512610+2517865(Top 63%)10767(Top 67%)10767(Top 191%)
Finish26.22 mi1.02 mi20747-4112608+212608+221900(Top 77%)12733(Top 79%)12733(Top 226%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

21760

Males

13289

M18-39

13289

5K→10K

3.1 - 6.2 mi

Top 79%
×5story building
+79ft-138ft

Overall

22568

Males

13601

M18-39

13601

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

21760

Males

13289

M18-39

13289

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

20942

Males

12865

M18-39

12865

20K→Half

12.4 - 13.1 mi

Top 76%
×2story building
+19ft-37ft

Overall

21643

Males

13183

M18-39

13183

Half→25K

13.1 - 15.5 mi

Top 70%
×4story building
+66ft-88ft

Overall

19789

Males

12326

M18-39

12326

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

18858

Males

11769

M18-39

11769

30K→20M

18.6 - 20.0 mi

Top 66%
×5story building
+64ft-50ft

Overall

18823

Males

11605

M18-39

11605

20M→21M

20.0 - 21.0 mi

Top 58%
×8story building
+106ft-24ft

Overall

16457

Males

10465

M18-39

10465

21M→35K

21.0 - 21.8 mi

Top 68%
×7story building
+17ft-86ft

Overall

19445

Males

11712

M18-39

11712

35K→23M

21.8 - 23.0 mi

Top 64%
×5story building
+23ft-63ft

Overall

18167

Males

11062

M18-39

11062

23M→24M

23.0 - 24.0 mi

Top 68%
×6story building
+12ft-82ft

Overall

19299

Males

11553

M18-39

11553

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

20822

Males

12198

M18-39

12198

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

17865

Males

10767

M18-39

10767

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2story building
+22ft-21ft

Overall

21900

Males

12733

M18-39

12733

Passing Analysis

Category:
Athletes Passed
4157
Passed By
311
Net Change
+3846
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24593
5K → 10K95416+938#24593#23655
10K → 15K55518+537#23655#23118
15K → 20K54710+537#23118#22581
20K → Half6712+55#22581#22526
Half → 25K4668+458#22526#22068
25K → 30K60713+594#22068#21474
30K → 20M2158+207#21474#21267
20M → 21M2693+266#21267#21001
21M → 35K8826+62#21001#20939
35K → 23M17419+155#20939#20784
23M → 24M8834+54#20784#20730
24M → 40K5168-17#20730#20747
40K → 25.2M476+41#20747#20706
25.2M → Finish2970-41#20706#20747
TOTALS4157311+3846
📊

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