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BOSTON MARATHON 2025

David Boonstra

Bib: 14935•M

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 27%
Gender (Male)
#0 / 16105
Top 40%
Masters (Masters Men)
#0 / 10463
Top 27%
Division (M45-49)
#0 / 2386
Top 39%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:40
Rank: #13252
Start → 5K
23:40 | 7:37/mi
10K· 6.21 mi
46:34
Rank: #12063 (+1189)
5K → 10K
22:54 | 7:22/mi
15K· 9.32 mi
1:09:16
Rank: #11351 (+712)
10K → 15K
22:42 | 7:18/mi
20K· 12.43 mi
1:31:54
Rank: #10707 (+644)
15K → 20K
22:38 | 7:17/mi
Half· 13.11 mi
1:36:45
Rank: #10575 (+132)
20K → Half
4:51 | 7:07/mi
25K· 15.53 mi
1:54:17
Rank: #10065 (+510)
Half → 25K
17:32 | 7:14/mi
30K· 18.64 mi
2:17:04
Rank: #9292 (+773)
25K → 30K
22:47 | 7:20/mi
20M
2:27:05
Rank: #8994 (+298)
30K → 20M
10:01 | 7:22/mi
21M
2:34:41
Rank: #8685 (+309)
20M → 21M
7:36 | 7:36/mi
35K· 21.75 mi
2:39:59
Rank: #8528 (+157)
21M → 35K
5:18 | 7:05/mi
23M
2:48:58
Rank: #8196 (+332)
35K → 23M
8:59 | 7:10/mi
24M
2:56:11
Rank: #8029 (+167)
23M → 24M
7:13 | 7:13/mi
40K· 24.85 mi
3:02:28
Rank: #7907 (+122)
24M → 40K
6:17 | 7:21/mi
25.2M
3:05:13
Rank: #7837 (+70)
40K → 25.2M
2:45 | 7:58/mi
Finish· 26.22 mi
3:12:31
Rank: #7745 (+92)
25.2M → Finish
7:18 | 7:10/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:36:45
Pace7:23 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:35:46
Pace7:18 /mi
📊Negative Split: 1.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:4623:407:3723:40
7:37
-
10K
6.21 mi11:18:4046:347:3022:54
7:22
-0:15
15K
9.32 mi11:41:221:09:167:2622:42
7:18
-0:04
20K
12.43 mi12:04:001:31:547:2422:38
7:17
-0:01
Half
13.11 mi12:08:511:36:457:234:51
7:07
-0:10
25K
15.53 mi12:26:231:54:177:2117:32
7:14
+0:07
30K
18.64 mi12:49:102:17:047:2122:47
7:20
+0:06
20M
20.00 mi12:59:112:27:057:2110:01
7:22
+0:02
21M
21.00 mi13:06:472:34:417:227:36
7:36
+0:14
35K
21.75 mi13:12:052:39:597:215:18
7:05
-0:31
23M
23.00 mi13:21:042:48:587:218:59
7:10
+0:05
24M
24.00 mi13:28:172:56:117:207:13
7:13
+0:03
40K
24.85 mi13:34:343:02:287:206:17
7:21
+0:08
25.2M
25.20 mi13:37:193:05:137:212:45
7:58
+0:37
Finish
26.22 mi13:44:373:12:317:217:18
7:10
-0:48

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

7:05 /mi

Average Pace

7:21 /mi

Slowest Pace

7:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:09:46

99% of race

Time at Steady Pace

2:45

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:21 /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 mi10:55:4623:407:3723:40
7:37
#13252
10K
6.21 mi11:18:4046:347:3022:54
7:22
#12063
15K
9.32 mi11:41:221:09:167:2622:42
7:18
#11351
20K
12.43 mi12:04:001:31:547:2422:38
7:17
#10707
Half
13.11 mi12:08:511:36:457:234:51
7:07
#10575
25K
15.53 mi12:26:231:54:177:2117:32
7:14
#10065
30K
18.64 mi12:49:102:17:047:2122:47
7:20
#9292
20M
20.00 mi12:59:112:27:057:2110:01
7:22
#8994
21M
21.00 mi13:06:472:34:417:227:36
7:36
#8685
35K
21.75 mi13:12:052:39:597:215:18
7:05
#8528
23M
23.00 mi13:21:042:48:587:218:59
7:10
#8196
24M
24.00 mi13:28:172:56:117:207:13
7:13
#8029
40K
24.85 mi13:34:343:02:287:206:17
7:21
#7907
25.2M
25.20 mi13:37:193:05:137:212:45
7:58
#7837
Finish
26.22 mi13:44:373:12:317:217:18
7:10
#7745
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi132529741974110026(Top 35%)8094(Top 50%)8094(Top 339%)
10K6.21 mi3.10 mi12063+11899182+5599182+55910903(Top 38%)8610(Top 53%)8610(Top 361%)
15K9.32 mi3.11 mi11351+7128818+3648818+36410026(Top 35%)8094(Top 50%)8094(Top 339%)
20K12.43 mi3.11 mi10707+6448479+3398479+3398910(Top 31%)7392(Top 46%)7392(Top 310%)
Half13.11 mi0.68 mi10575+1328410+698410+698309(Top 29%)7078(Top 44%)7078(Top 297%)
25K15.53 mi2.42 mi10065+5108094+3168094+3167817(Top 28%)6646(Top 41%)6646(Top 279%)
30K18.64 mi3.11 mi9292+7737627+4677627+4676650(Top 23%)5747(Top 36%)5747(Top 241%)
20M20.00 mi1.36 mi8994+2987432+1957432+1956212(Top 22%)5343(Top 33%)5343(Top 224%)
21M21.00 mi1.00 mi8685+3097215+2177215+2175137(Top 18%)4483(Top 28%)4483(Top 188%)
35K21.75 mi0.75 mi8528+1577106+1097106+1095911(Top 21%)5010(Top 31%)5010(Top 210%)
23M23.00 mi1.25 mi8196+3326867+2396867+2394739(Top 17%)4136(Top 26%)4136(Top 173%)
24M24.00 mi1.00 mi8029+1676717+1506717+1505929(Top 21%)4877(Top 30%)4877(Top 204%)
40K24.85 mi0.85 mi7907+1226615+1026615+1025915(Top 21%)4802(Top 30%)4802(Top 201%)
25.2M25.20 mi0.35 mi7837+706558+576558+575801(Top 20%)4626(Top 29%)4626(Top 194%)
Finish26.22 mi1.02 mi7745+926472+866472+866798(Top 24%)5208(Top 32%)5208(Top 218%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

10026

Males

8094

M45-49

8094

5K→10K

3.1 - 6.2 mi

Top 38%
×5stories
+79ft-138ft

Overall

10903

Males

8610

M45-49

8610

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

10026

Males

8094

M45-49

8094

15K→20K

9.3 - 12.4 mi

Top 31%
×5stories
+106ft-86ft

Overall

8910

Males

7392

M45-49

7392

20K→Half

12.4 - 13.1 mi

Top 29%
×2stories
+19ft-37ft

Overall

8309

Males

7078

M45-49

7078

Half→25K

13.1 - 15.5 mi

Top 28%
×4stories
+66ft-88ft

Overall

7817

Males

6646

M45-49

6646

25K→30K

15.5 - 18.6 mi

Top 23%
×9stories
+181ft-148ft

Overall

6650

Males

5747

M45-49

5747

30K→20M

18.6 - 20.0 mi

Top 22%
×5stories
+64ft-50ft

Overall

6212

Males

5343

M45-49

5343

20M→21M

20.0 - 21.0 mi

Top 18%
×8stories
+106ft-24ft

Overall

5137

Males

4483

M45-49

4483

21M→35K

21.0 - 21.8 mi

Top 21%
×7stories
+17ft-86ft

Overall

5911

Males

5010

M45-49

5010

35K→23M

21.8 - 23.0 mi

Top 17%
×5stories
+23ft-63ft

Overall

4739

Males

4136

M45-49

4136

23M→24M

23.0 - 24.0 mi

Top 21%
×6stories
+12ft-82ft

Overall

5929

Males

4877

M45-49

4877

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

5915

Males

4802

M45-49

4802

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5801

Males

4626

M45-49

4626

25.2M→Finish

25.2 - 26.2 mi

Top 24%
×2stories
+22ft-21ft

Overall

6798

Males

5208

M45-49

5208

Passing Analysis

Category:
Athletes Passed
5619*
Passed By
112
Net Change
+5507
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13252
5K → 10K121223+1189#13252#12063
10K → 15K7208+712#12063#11351
15K → 20K6495+644#11351#10707
20K → Half1320+132#10707#10575
Half → 25K5166+510#10575#10065
25K → 30K775*2+773#10065#9292
30K → 20M3024+298#9292#8994
20M → 21M3145+309#8994#8685
21M → 35K1614+157#8685#8528
35K → 23M3353+332#8528#8196
23M → 24M17912+167#8196#8029
24M → 40K13311+122#8029#7907
40K → 25.2M788+70#7907#7837
25.2M → Finish11321+92#7837#7745
TOTALS5619*112+5507

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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