Boston Marathon logo
BOSTON MARATHON 2025

Douglas Alexander

Bib: 18393•M

ON

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
Top 44%
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
7:57/mi
24:42
↑ 97↓ 3451.5%
10K· 6.21 mi
8:00/mi
49:32
↑ 79↓ 1380.4%
15K· 9.32 mi
8:01/mi
1:14:26
↑ 67↓ 78
20K· 12.43 mi
8:04/mi
1:39:29
↑ 106↓ 860.1%
Half· 13.11 mi
7:52/mi
1:44:51
↑ 19↓ 370.5%
25K· 15.53 mi
8:03/mi
2:04:22
↑ 66↓ 880.2%
30K· 18.64 mi
8:25/mi
2:30:30
↑ 181↓ 1480.2%
20M
8:37/mi
2:42:12
↑ 64↓ 500.2%
21M
9:17/mi
2:51:29
↑ 106↓ 241.6%
35K· 21.75 mi
8:12/mi
2:57:37
↑ 17↓ 861.7%
23M
8:35/mi
3:08:22
↑ 23↓ 630.6%
24M
8:07/mi
3:16:29
↓ 821.3%
40K· 24.85 mi
8:25/mi
3:23:41
↓ 200.3%
25.2M
8:48/mi
3:26:43
↑ 13↓ 160.2%
Finish· 26.22 mi
7:49/mi
3:34:41
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:51
Pace8:00 /mi
2nd Half
Distance13.11 mi
Time1:49:50
Pace8:23 /mi
📊Positive Split: 4.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:5724:427:5724:42
7:57
-
10K
6.21 mi11:42:4749:327:5824:50
8:00
+0:03
15K
9.32 mi12:07:411:14:267:5924:54
8:01
+0:01
20K
12.43 mi12:32:441:39:298:0025:03
8:04
+0:03
Half
13.11 mi12:38:061:44:518:005:22
7:52
-0:12
25K
15.53 mi12:57:372:04:228:0019:31
8:03
+0:11
30K
18.64 mi13:23:452:30:308:0426:08
8:25
+0:22
20M
20.00 mi13:35:272:42:128:0711:42
8:37
+0:12
21M
21.00 mi13:44:442:51:298:109:17
9:17
+0:40
35K
21.75 mi13:50:522:57:378:106:08
8:12
-1:05
23M
23.00 mi14:01:373:08:228:1110:45
8:35
+0:23
24M
24.00 mi14:09:443:16:298:118:07
8:07
-0:28
40K
24.85 mi14:16:563:23:418:127:12
8:25
+0:18
25.2M
25.20 mi14:19:583:26:438:123:02
8:48
+0:23
Finish
26.22 mi14:27:563:34:418:127:58
7:49
-0:59

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

7:49 /mi

Average Pace

8:12 /mi

Slowest Pace

9:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:40

89% of race

Time at Steady Pace

14:44

7% of race

Time at Slower Pace

9:17

4% of race

Average Pace: 8:11 /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 mi11:17:5724:427:5724:42
7:57
#16178
10K
6.21 mi11:42:4749:327:5824:50
8:00
#16263
15K
9.32 mi12:07:411:14:267:5924:54
8:01
#16213
20K
12.43 mi12:32:441:39:298:0025:03
8:04
#15965
Half
13.11 mi12:38:061:44:518:005:22
7:52
#15899
25K
15.53 mi12:57:372:04:228:0019:31
8:03
#15588
30K
18.64 mi13:23:452:30:308:0426:08
8:25
#15310
20M
20.00 mi13:35:272:42:128:0711:42
8:37
#15222
21M
21.00 mi13:44:442:51:298:109:17
9:17
#15138
35K
21.75 mi13:50:522:57:378:106:08
8:12
#15064
23M
23.00 mi14:01:373:08:228:1110:45
8:35
#14943
24M
24.00 mi14:09:443:16:298:118:07
8:07
#14789
40K
24.85 mi14:16:563:23:418:127:12
8:25
#14706
25.2M
25.20 mi14:19:583:26:438:123:02
8:48
#14617
Finish
26.22 mi14:27:563:34:418:127:58
7:49
#14480
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi16178108771087716137(Top 57%)10864(Top 67%)10864(Top 659%)
10K6.21 mi3.10 mi16263-8510909-3210909-3216411(Top 58%)10987(Top 68%)10987(Top 667%)
15K9.32 mi3.11 mi16213+5010903+610903+616137(Top 57%)10864(Top 67%)10864(Top 659%)
20K12.43 mi3.11 mi15965+24810790+11310790+11315356(Top 54%)10476(Top 65%)10476(Top 636%)
Half13.11 mi0.68 mi15899+6610761+2910761+2914757(Top 52%)10232(Top 64%)10232(Top 621%)
25K15.53 mi2.42 mi15588+31110604+15710604+15714258(Top 50%)9876(Top 61%)9876(Top 599%)
30K18.64 mi3.11 mi15310+27810436+16810436+16814197(Top 50%)9679(Top 60%)9679(Top 587%)
20M20.00 mi1.36 mi15222+8810355+8110355+8114478(Top 51%)9673(Top 60%)9673(Top 587%)
21M21.00 mi1.00 mi15138+8410291+6410291+6415049(Top 53%)9809(Top 61%)9809(Top 595%)
35K21.75 mi0.75 mi15064+7410244+4710244+4713595(Top 48%)9088(Top 56%)9088(Top 551%)
23M23.00 mi1.25 mi14943+12110164+8010164+8013831(Top 49%)9086(Top 56%)9086(Top 551%)
24M24.00 mi1.00 mi14789+15410065+9910065+9912017(Top 42%)8183(Top 51%)8183(Top 497%)
40K24.85 mi0.85 mi14706+839997+689997+6812909(Top 45%)8488(Top 53%)8488(Top 515%)
25.2M25.20 mi0.35 mi14617+899949+489949+4810609(Top 37%)7301(Top 45%)7301(Top 443%)
Finish26.22 mi1.02 mi14480+1379857+929857+9211557(Top 41%)7802(Top 48%)7802(Top 473%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21story building
+97ft-345ft

Overall

16137

Males

10864

M55-59

10864

5K→10K

3.1 - 6.2 mi

Top 58%
×5story building
+79ft-138ft

Overall

16411

Males

10987

M55-59

10987

10K→15K

6.2 - 9.3 mi

Top 57%
×3story building
+67ft-78ft

Overall

16137

Males

10864

M55-59

10864

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

15356

Males

10476

M55-59

10476

20K→Half

12.4 - 13.1 mi

Top 52%
×2story building
+19ft-37ft

Overall

14757

Males

10232

M55-59

10232

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

14258

Males

9876

M55-59

9876

25K→30K

15.5 - 18.6 mi

Top 50%
×9story building
+181ft-148ft

Overall

14197

Males

9679

M55-59

9679

30K→20M

18.6 - 20.0 mi

Top 51%
×5story building
+64ft-50ft

Overall

14478

Males

9673

M55-59

9673

20M→21M

20.0 - 21.0 mi

Top 53%
×8story building
+106ft-24ft

Overall

15049

Males

9809

M55-59

9809

21M→35K

21.0 - 21.8 mi

Top 48%
×7story building
+17ft-86ft

Overall

13595

Males

9088

M55-59

9088

35K→23M

21.8 - 23.0 mi

Top 49%
×5story building
+23ft-63ft

Overall

13831

Males

9086

M55-59

9086

23M→24M

23.0 - 24.0 mi

Top 42%
×6story building
+12ft-82ft

Overall

12017

Males

8183

M55-59

8183

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

12909

Males

8488

M55-59

8488

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

10609

Males

7301

M55-59

7301

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2story building
+22ft-21ft

Overall

11557

Males

7802

M55-59

7802

Passing Analysis

Category:
Athletes Passed
2716
Passed By
1018
Net Change
+1698
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16178
5K → 10K256341-85#16178#16263
10K → 15K234184+50#16263#16213
15K → 20K33183+248#16213#15965
20K → Half726+66#15965#15899
Half → 25K34635+311#15899#15588
25K → 30K384106+278#15588#15310
30K → 20M15769+88#15310#15222
20M → 21M15066+84#15222#15138
21M → 35K9521+74#15138#15064
35K → 23M17150+121#15064#14943
23M → 24M1606+154#14943#14789
24M → 40K10926+83#14789#14706
40K → 25.2M934+89#14706#14617
25.2M → Finish15821+137#14617#14480
TOTALS27161018+1698
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing