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BOSTON MARATHON 2025

Erik Nieuwenboom

Bib: 12523•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 29%
Gender (Male)
#0 / 16105
Top 42%
Masters (Masters Men)
#0 / 10463
Top 30%
Division (M50-54)
#0 / 1996
Top 27%
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
6:48/mi
21:07
↑ 97↓ 3451.5%
10K· 6.21 mi
6:51/mi
42:23
↑ 79↓ 1380.4%
15K· 9.32 mi
6:59/mi
1:04:05
↑ 67↓ 78
20K· 12.43 mi
7:06/mi
1:26:10
↑ 106↓ 860.1%
Half· 13.11 mi
6:56/mi
1:30:54
↑ 19↓ 370.5%
25K· 15.53 mi
7:20/mi
1:48:41
↑ 66↓ 880.2%
30K· 18.64 mi
7:55/mi
2:13:17
↑ 181↓ 1480.2%
20M
8:06/mi
2:24:17
↑ 64↓ 500.2%
21M
8:38/mi
2:32:55
↑ 106↓ 241.6%
35K· 21.75 mi
7:29/mi
2:38:31
↑ 17↓ 861.7%
23M
7:43/mi
2:48:11
↑ 23↓ 630.6%
24M
7:46/mi
2:55:57
↓ 821.3%
40K· 24.85 mi
8:05/mi
3:02:52
↓ 200.3%
25.2M
9:11/mi
3:06:02
↑ 13↓ 160.2%
Finish· 26.22 mi
7:56/mi
3:14:07
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:30:54
Pace6:56 /mi
2nd Half
Distance13.11 mi
Time1:43:13
Pace7:52 /mi
📊Positive Split: 13.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:3821:076:4821:07
6:48
-
10K
6.21 mi11:09:5442:236:4921:16
6:51
+0:03
15K
9.32 mi11:31:361:04:056:5321:42
6:59
+0:08
20K
12.43 mi11:53:411:26:106:5622:05
7:06
+0:07
Half
13.11 mi11:58:251:30:546:564:44
6:56
-0:10
25K
15.53 mi12:16:121:48:417:0017:47
7:20
+0:24
30K
18.64 mi12:40:482:13:177:0924:36
7:55
+0:35
20M
20.00 mi12:51:482:24:177:1311:00
8:06
+0:11
21M
21.00 mi13:00:262:32:557:178:38
8:38
+0:32
35K
21.75 mi13:06:022:38:317:175:36
7:29
-1:09
23M
23.00 mi13:15:422:48:117:199:40
7:43
+0:14
24M
24.00 mi13:23:282:55:577:207:46
7:46
+0:03
40K
24.85 mi13:30:233:02:527:216:55
8:05
+0:19
25.2M
25.20 mi13:33:333:06:027:233:10
9:11
+1:06
Finish
26.22 mi13:41:383:14:077:258:05
7:56
-1:15

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

6:48 /mi

Average Pace

7:25 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:48:41

56% of race

Time at Steady Pace

55:43

29% of race

Time at Slower Pace

29:43

15% of race

Average Pace: 7:24 /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 mi10:48:3821:076:4821:07
6:48
#6294
10K
6.21 mi11:09:5442:236:4921:16
6:51
#6502
15K
9.32 mi11:31:361:04:056:5321:42
6:59
#6874
20K
12.43 mi11:53:411:26:106:5622:05
7:06
#7094
Half
13.11 mi11:58:251:30:546:564:44
6:56
#7080
25K
15.53 mi12:16:121:48:417:0017:47
7:20
#7242
30K
18.64 mi12:40:482:13:177:0924:36
7:55
#7678
20M
20.00 mi12:51:482:24:177:1311:00
8:06
#7858
21M
21.00 mi13:00:262:32:557:178:38
8:38
#7973
35K
21.75 mi13:06:022:38:317:175:36
7:29
#7969
23M
23.00 mi13:15:422:48:117:199:40
7:43
#7900
24M
24.00 mi13:23:282:55:577:207:46
7:46
#7963
40K
24.85 mi13:30:233:02:527:216:55
8:05
#8043
25.2M
25.20 mi13:33:333:06:027:233:10
9:11
#8117
Finish
26.22 mi13:41:383:14:077:258:05
7:56
#8260
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi6294575557557516(Top 26%)6625(Top 41%)6625(Top 332%)
10K6.21 mi3.10 mi6502-2085917-1625917-1626835(Top 24%)6151(Top 38%)6151(Top 308%)
15K9.32 mi3.11 mi6874-3726183-2666183-2667516(Top 26%)6625(Top 41%)6625(Top 332%)
20K12.43 mi3.11 mi7094-2206341-1586341-1587562(Top 27%)6590(Top 41%)6590(Top 330%)
Half13.11 mi0.68 mi7080+146328+136328+137161(Top 25%)6338(Top 39%)6338(Top 318%)
25K15.53 mi2.42 mi7242-1626427-996427-998617(Top 30%)7117(Top 44%)7117(Top 357%)
30K18.64 mi3.11 mi7678-4366676-2496676-24910762(Top 38%)8059(Top 50%)8059(Top 404%)
20M20.00 mi1.36 mi7858-1806750-746750-7411036(Top 39%)8035(Top 50%)8035(Top 403%)
21M21.00 mi1.00 mi7973-1156786-366786-3611257(Top 40%)8001(Top 50%)8001(Top 401%)
35K21.75 mi0.75 mi7969+46764+226764+228484(Top 30%)6576(Top 41%)6576(Top 329%)
23M23.00 mi1.25 mi7900+696674+906674+908012(Top 28%)6168(Top 38%)6168(Top 309%)
24M24.00 mi1.00 mi7963-636679-56679-59529(Top 34%)6921(Top 43%)6921(Top 347%)
40K24.85 mi0.85 mi8043-806696-176696-1710746(Top 38%)7424(Top 46%)7424(Top 372%)
25.2M25.20 mi0.35 mi8117-746737-416737-4112723(Top 45%)8308(Top 52%)8308(Top 416%)
Finish26.22 mi1.02 mi8260-1436786-496786-4912379(Top 44%)8212(Top 51%)8212(Top 411%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 26%
×21story building
+97ft-345ft

Overall

7516

Males

6625

M50-54

6625

5K→10K

3.1 - 6.2 mi

Top 24%
×5story building
+79ft-138ft

Overall

6835

Males

6151

M50-54

6151

10K→15K

6.2 - 9.3 mi

Top 26%
×3story building
+67ft-78ft

Overall

7516

Males

6625

M50-54

6625

15K→20K

9.3 - 12.4 mi

Top 27%
×5story building
+106ft-86ft

Overall

7562

Males

6590

M50-54

6590

20K→Half

12.4 - 13.1 mi

Top 25%
×2story building
+19ft-37ft

Overall

7161

Males

6338

M50-54

6338

Half→25K

13.1 - 15.5 mi

Top 30%
×4story building
+66ft-88ft

Overall

8617

Males

7117

M50-54

7117

25K→30K

15.5 - 18.6 mi

Top 38%
×9story building
+181ft-148ft

Overall

10762

Males

8059

M50-54

8059

30K→20M

18.6 - 20.0 mi

Top 39%
×5story building
+64ft-50ft

Overall

11036

Males

8035

M50-54

8035

20M→21M

20.0 - 21.0 mi

Top 40%
×8story building
+106ft-24ft

Overall

11257

Males

8001

M50-54

8001

21M→35K

21.0 - 21.8 mi

Top 30%
×7story building
+17ft-86ft

Overall

8484

Males

6576

M50-54

6576

35K→23M

21.8 - 23.0 mi

Top 28%
×5story building
+23ft-63ft

Overall

8012

Males

6168

M50-54

6168

23M→24M

23.0 - 24.0 mi

Top 34%
×6story building
+12ft-82ft

Overall

9529

Males

6921

M50-54

6921

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10746

Males

7424

M50-54

7424

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12723

Males

8308

M50-54

8308

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2story building
+22ft-21ft

Overall

12379

Males

8212

M50-54

8212

Passing Analysis

Category:
Athletes Passed
875
Passed By
2841
Net Change
-1966
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6294
5K → 10K108316-208#6294#6502
10K → 15K63435-372#6502#6874
15K → 20K67287-220#6874#7094
20K → Half2612+14#7094#7080
Half → 25K73235-162#7080#7242
25K → 30K83519-436#7242#7678
30K → 20M43223-180#7678#7858
20M → 21M73188-115#7858#7973
21M → 35K6157+4#7973#7969
35K → 23M13061+69#7969#7900
23M → 24M56119-63#7900#7963
24M → 40K50130-80#7963#8043
40K → 25.2M1387-74#8043#8117
25.2M → Finish29172-143#8117#8260
TOTALS8752841-1966
📊

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