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BOSTON MARATHON 2025

Colin Johnston

CO

Bib: 29825 M

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

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
10:26/mi
32:25
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
10:43/mi
1:05:42
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
10:07/mi
1:37:08
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
10:16/mi
2:09:02
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
10:21/mi
2:16:06
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
10:37/mi
2:41:51
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
11:18/mi
3:16:57
↑ 181↓ 1480.2%
138 ft elev
20M
10:52/mi
3:31:43
↑ 64↓ 500.2%
148 ft elev
21M
11:28/mi
3:43:11
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
10:30/mi
3:51:02
↑ 17↓ 861.7%
156 ft elev
23M
10:59/mi
4:04:47
↑ 23↓ 630.6%
116 ft elev
24M
10:57/mi
4:15:44
↓ 821.3%
34 ft elev
40K· 24.85 mi
10:54/mi
4:25:03
↓ 200.3%
20 ft elev
25.2M
10:47/mi
4:28:46
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
9:32/mi
4:38:29
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
2:16:0610:23 /mi⚡ faster
2nd Half
2:22:2310:52 /mi+4.6%
Positive split — 4.6% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
32:2510:263.11 mi32:25
10:26
-
10K
1:05:4210:343.10 mi33:17
10:43
+0:17
15K
1:37:0810:253.11 mi31:26
10:07
-0:36
20K
2:09:0210:233.11 mi31:54
10:16
+0:09
Half(13.11 mi)
2:16:0610:230.68 mi7:04
10:21
+0:05
25K
2:41:5110:252.42 mi25:45
10:37
+0:16
30K
3:16:5710:343.11 mi35:06
11:18
+0:41
20M
3:31:4310:351.36 mi14:46
10:52
-0:26
21M
3:43:1110:381.00 mi11:28
11:28
+0:36
35K
3:51:0210:370.75 mi7:51
10:30
-0:58
23M
4:04:4710:391.25 mi13:45
10:59
+0:29
24M
4:15:4410:391.00 mi10:57
10:57
-0:02
40K
4:25:0310:400.85 mi9:19
10:54
-0:03
25.2M
4:28:4610:400.35 mi3:43
10:47
-0:07
Finish(26.22 mi)
4:38:2910:381.02 mi9:43
9:32
-1:15
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

9:32 /mi

Average Pace

10:38 /mi

Slowest Pace

11:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

1:52:32

40% of race

Time at Steady Pace

1:34:41

34% of race

Time at Slower Pace

1:11:16

26% of race

Average Pace: 10:37 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi266201544215442252381481214812
10K3.10 mi26631-1115439+315439+3266271542115421
15K3.11 mi26123+50815210+22915210+229252381481214812
20K3.11 mi25762+36115045+16515045+165247691456814568
Half(13.11 mi)0.68 mi25742+2015041+415041+4255461490314903
25K2.42 mi25552+19014941+10014941+100245781445514455
30K3.11 mi25354+19814810+13114810+131245461432914329
20M1.36 mi25221+13314735+7514735+75233121366813668
21M1.00 mi25092+12914671+6414671+64225571322913229
35K0.75 mi25056+3614644+2714644+27231491346513465
23M1.25 mi24968+8814591+5314591+53231821342213422
24M1.00 mi24929+3914561+3014561+30238941377513775
40K0.85 mi24861+6814519+4214519+42229011319813198
25.2M0.35 mi24812+4914489+3014489+30199631178511785
Finish(26.22 mi)1.02 mi24737+7514445+4414445+44212961243712437

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 89%
×21story building
+97ft-345ft

Overall

25238

Males

14812

M18-39

14812

5K→10K

3.1 - 6.2 mi

Top 94%
×5story building
+79ft-138ft

Overall

26627

Males

15421

M18-39

15421

10K→15K

6.2 - 9.3 mi

Top 89%
×3story building
+67ft-78ft

Overall

25238

Males

14812

M18-39

14812

15K→20K

9.3 - 12.4 mi

Top 87%
×5story building
+106ft-86ft

Overall

24769

Males

14568

M18-39

14568

20K→Half

12.4 - 13.1 mi

Top 90%
×2story building
+19ft-37ft

Overall

25546

Males

14903

M18-39

14903

Half→25K

13.1 - 15.5 mi

Top 87%
×4story building
+66ft-88ft

Overall

24578

Males

14455

M18-39

14455

25K→30K

15.5 - 18.6 mi

Top 86%
×9story building
+181ft-148ft

Overall

24546

Males

14329

M18-39

14329

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

23312

Males

13668

M18-39

13668

20M→21M

20.0 - 21.0 mi

Top 79%
×8story building
+106ft-24ft

Overall

22557

Males

13229

M18-39

13229

21M→35K

21.0 - 21.8 mi

Top 81%
×7story building
+17ft-86ft

Overall

23149

Males

13465

M18-39

13465

35K→23M

21.8 - 23.0 mi

Top 82%
×5story building
+23ft-63ft

Overall

23182

Males

13422

M18-39

13422

23M→24M

23.0 - 24.0 mi

Top 84%
×6story building
+12ft-82ft

Overall

23894

Males

13775

M18-39

13775

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

22901

Males

13198

M18-39

13198

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

19963

Males

11785

M18-39

11785

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

21296

Males

12437

M18-39

12437

Passing Analysis

Category:
Passed
2211
Passed By
328
Net Change
+1883
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26620
5K → 10K174185-11#26620#26631
10K → 15K5113+508#26631#26123
15K → 20K3643+361#26123#25762
20K → Half3111+20#25762#25742
Half → 25K21828+190#25742#25552
25K → 30K23032+198#25552#25354
30K → 20M1418+133#25354#25221
20M → 21M1389+129#25221#25092
21M → 35K4711+36#25092#25056
35K → 23M979+88#25056#24968
23M → 24M5314+39#24968#24929
24M → 40K7911+68#24929#24861
40K → 25.2M490+49#24861#24812
25.2M → Finish794+75#24812#24737
TOTALS2211328+1883

Passing Charts

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