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BOSTON MARATHON 2025

Brian Callow

Bib: 31451•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
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
8:59/mi
27:55
↑ 97↓ 3451.5%
10K· 6.21 mi
9:06/mi
56:12
↑ 79↓ 1380.4%
15K· 9.32 mi
9:14/mi
1:24:54
↑ 67↓ 78
20K· 12.43 mi
9:14/mi
1:53:36
↑ 106↓ 860.1%
Half· 13.11 mi
9:17/mi
1:59:56
↑ 19↓ 370.5%
25K· 15.53 mi
9:36/mi
2:23:13
↑ 66↓ 880.2%
30K· 18.64 mi
9:23/mi
2:52:23
↑ 181↓ 1480.2%
20M
9:58/mi
3:05:56
↑ 64↓ 500.2%
21M
10:57/mi
3:16:53
↑ 106↓ 241.6%
35K· 21.75 mi
9:45/mi
3:24:11
↑ 17↓ 861.7%
23M
10:52/mi
3:37:47
↑ 23↓ 630.6%
24M
13:35/mi
3:51:22
↓ 821.3%
40K· 24.85 mi
12:22/mi
4:01:56
↓ 200.3%
25.2M
11:50/mi
4:06:01
↑ 13↓ 160.2%
Finish· 26.22 mi
11:10/mi
4:17:24
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:56
Pace9:09 /mi
2nd Half
Distance13.11 mi
Time2:17:28
Pace10:29 /mi
📊Positive Split: 14.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:0327:558:5927:55
8:59
-
10K
6.21 mi12:18:2056:129:0328:17
9:06
+0:07
15K
9.32 mi12:47:021:24:549:0728:42
9:14
+0:08
20K
12.43 mi13:15:441:53:369:0828:42
9:14
0:00
Half
13.11 mi13:22:041:59:569:096:20
9:17
+0:03
25K
15.53 mi13:45:212:23:139:1323:17
9:36
+0:19
30K
18.64 mi14:14:312:52:239:1529:10
9:23
-0:13
20M
20.00 mi14:28:043:05:569:1813:33
9:58
+0:35
21M
21.00 mi14:39:013:16:539:2310:57
10:57
+0:59
35K
21.75 mi14:46:193:24:119:237:18
9:45
-1:12
23M
23.00 mi14:59:553:37:479:2813:36
10:52
+1:07
24M
24.00 mi15:13:303:51:229:3813:35
13:35
+2:43
40K
24.85 mi15:24:044:01:569:4410:34
12:22
-1:13
25.2M
25.20 mi15:28:094:06:019:464:05
11:50
-0:32
Finish
26.22 mi15:39:324:17:249:4911:23
11:10
-0:40

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

8:59 /mi

Average Pace

9:49 /mi

Slowest Pace

13:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

27:55

11% of race

Time at Steady Pace

2:45:19

64% of race

Time at Slower Pace

1:04:10

25% of race

Average Pace: 9:49 /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 mi11:50:0327:558:5927:55
8:59
#22354
10K
6.21 mi12:18:2056:129:0328:17
9:06
#22594
15K
9.32 mi12:47:021:24:549:0728:42
9:14
#22735
20K
12.43 mi13:15:441:53:369:0828:42
9:14
#22529
Half
13.11 mi13:22:041:59:569:096:20
9:17
#22565
25K
15.53 mi13:45:212:23:139:1323:17
9:36
#22496
30K
18.64 mi14:14:312:52:239:1529:10
9:23
#21966
20M
20.00 mi14:28:043:05:569:1813:33
9:58
#21857
21M
21.00 mi14:39:013:16:539:2310:57
10:57
#21824
35K
21.75 mi14:46:193:24:119:237:18
9:45
#21798
23M
23.00 mi14:59:553:37:479:2813:36
10:52
#21857
24M
24.00 mi15:13:303:51:229:3813:35
13:35
#22304
40K
24.85 mi15:24:044:01:569:4410:34
12:22
#22472
25.2M
25.20 mi15:28:094:06:019:464:05
11:50
#22485
Finish
26.22 mi15:39:324:17:249:4911:23
11:10
#22643
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi22354134651346522989(Top 81%)13827(Top 86%)13827(Top 839%)
10K6.21 mi3.10 mi22594-24013597-13213597-13222825(Top 80%)13730(Top 85%)13730(Top 833%)
15K9.32 mi3.11 mi22735-14113698-10113698-10122989(Top 81%)13827(Top 86%)13827(Top 839%)
20K12.43 mi3.11 mi22529+20613592+10613592+10622032(Top 78%)13375(Top 83%)13375(Top 812%)
Half13.11 mi0.68 mi22565-3613611-1913611-1922877(Top 81%)13736(Top 85%)13736(Top 833%)
25K15.53 mi2.42 mi22496+6913573+3813573+3822193(Top 78%)13377(Top 83%)13377(Top 812%)
30K18.64 mi3.11 mi21966+53013301+27213301+27219486(Top 69%)12053(Top 75%)12053(Top 731%)
20M20.00 mi1.36 mi21857+10913242+5913242+5920835(Top 73%)12517(Top 78%)12517(Top 760%)
21M21.00 mi1.00 mi21824+3313200+4213200+4221252(Top 75%)12617(Top 78%)12617(Top 766%)
35K21.75 mi0.75 mi21798+2613172+2813172+2821184(Top 75%)12529(Top 78%)12529(Top 760%)
23M23.00 mi1.25 mi21857-5913163+913163+922896(Top 81%)13292(Top 83%)13292(Top 807%)
24M24.00 mi1.00 mi22304-44713336-17313336-17327394(Top 96%)15481(Top 96%)15481(Top 939%)
40K24.85 mi0.85 mi22472-16813397-6113397-6125448(Top 90%)14490(Top 90%)14490(Top 879%)
25.2M25.20 mi0.35 mi22485-1313393+413393+422873(Top 81%)13216(Top 82%)13216(Top 802%)
Finish26.22 mi1.02 mi22643-15813446-5313446-5325656(Top 90%)14602(Top 91%)14602(Top 886%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21story building
+97ft-345ft

Overall

22989

Males

13827

M55-59

13827

5K→10K

3.1 - 6.2 mi

Top 80%
×5story building
+79ft-138ft

Overall

22825

Males

13730

M55-59

13730

10K→15K

6.2 - 9.3 mi

Top 81%
×3story building
+67ft-78ft

Overall

22989

Males

13827

M55-59

13827

15K→20K

9.3 - 12.4 mi

Top 78%
×5story building
+106ft-86ft

Overall

22032

Males

13375

M55-59

13375

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

22877

Males

13736

M55-59

13736

Half→25K

13.1 - 15.5 mi

Top 78%
×4story building
+66ft-88ft

Overall

22193

Males

13377

M55-59

13377

25K→30K

15.5 - 18.6 mi

Top 69%
×9story building
+181ft-148ft

Overall

19486

Males

12053

M55-59

12053

30K→20M

18.6 - 20.0 mi

Top 73%
×5story building
+64ft-50ft

Overall

20835

Males

12517

M55-59

12517

20M→21M

20.0 - 21.0 mi

Top 75%
×8story building
+106ft-24ft

Overall

21252

Males

12617

M55-59

12617

21M→35K

21.0 - 21.8 mi

Top 75%
×7story building
+17ft-86ft

Overall

21184

Males

12529

M55-59

12529

35K→23M

21.8 - 23.0 mi

Top 81%
×5story building
+23ft-63ft

Overall

22896

Males

13292

M55-59

13292

23M→24M

23.0 - 24.0 mi

Top 96%
×6story building
+12ft-82ft

Overall

27394

Males

15481

M55-59

15481

24M→40K

24.0 - 24.9 mi

Top 90%
×1story
+6ft-20ft

Overall

25448

Males

14490

M55-59

14490

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

22873

Males

13216

M55-59

13216

25.2M→Finish

25.2 - 26.2 mi

Top 90%
×2story building
+22ft-21ft

Overall

25656

Males

14602

M55-59

14602

Passing Analysis

Category:
Athletes Passed
1707
Passed By
1996
Net Change
-289
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22354
5K → 10K154394-240#22354#22594
10K → 15K132273-141#22594#22735
15K → 20K27569+206#22735#22529
20K → Half2763-36#22529#22565
Half → 25K174105+69#22565#22496
25K → 30K54212+530#22496#21966
30K → 20M14132+109#21966#21857
20M → 21M9865+33#21857#21824
21M → 35K5832+26#21824#21798
35K → 23M64123-59#21798#21857
23M → 24M4451-447#21857#22304
24M → 40K12180-168#22304#22472
40K → 25.2M1326-13#22472#22485
25.2M → Finish13171-158#22485#22643
TOTALS17071996-289
📊

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