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BOSTON MARATHON 2025

Mauritz Jansen-Van Rensburg

Bib: 12742 M ZA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 18%
Gender (Male)
#0 / 16105
Top 29%
Masters (Masters Men)
#0 / 10463
Top 15%
Division (M50-54)
#0 / 1996
Top 9%
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
6:52/mi
21:19
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
6:51/mi
42:35
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
6:45/mi
1:03:32
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
6:46/mi
1:24:34
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
6:31/mi
1:29:01
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
6:43/mi
1:45:17
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:02/mi
2:07:07
↑ 181↓ 1480.2%
138 ft elev
20M
7:01/mi
2:16:39
↑ 64↓ 500.2%
148 ft elev
21M
7:41/mi
2:24:20
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
6:44/mi
2:29:22
↑ 17↓ 861.7%
156 ft elev
23M
7:14/mi
2:38:26
↑ 23↓ 630.6%
116 ft elev
24M
7:01/mi
2:45:27
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:22/mi
2:51:45
↓ 200.3%
20 ft elev
25.2M
8:25/mi
2:54:39
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:36/mi
3:02:24
↑ 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
1:29:016:47 /mi⚡ faster
2nd Half
1:33:237:07 /mi+4.9%
Positive split — 4.9% 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
21:196:523.11 mi21:19
6:52
-
10K
42:356:513.10 mi21:16
6:51
-0:01
15K
1:03:326:493.11 mi20:57
6:45
-0:06
20K
1:24:346:483.11 mi21:02
6:46
+0:01
Half(13.11 mi)
1:29:016:470.68 mi4:27
6:31
-0:15
25K
1:45:176:472.42 mi16:16
6:43
+0:12
30K
2:07:076:493.11 mi21:50
7:02
+0:19
20M
2:16:396:501.36 mi9:32
7:01
-0:01
21M
2:24:206:521.00 mi7:41
7:41
+0:40
35K
2:29:226:520.75 mi5:02
6:44
-0:57
23M
2:38:266:531.25 mi9:04
7:14
+0:30
24M
2:45:276:541.00 mi7:01
7:01
-0:13
40K
2:51:456:550.85 mi6:18
7:22
+0:21
25.2M
2:54:396:560.35 mi2:54
8:25
+1:03
Finish(26.22 mi)
3:02:246:581.02 mi7:45
7:36
-0:49
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

6:31 /mi

Average Pace

6:58 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

1:07:44

37% of race

Time at Steady Pace

1:30:02

49% of race

Time at Slower Pace

24:38

14% of race

Average Pace: 6:57 /mi

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

Heatmap

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi676361286128549650425042
10K6.21 mi3.10 mi6771-86114+146114+14681861346134
15K9.32 mi3.11 mi6357+4145792+3225792+322549650425042
20K12.43 mi3.11 mi5979+3785468+3245468+324499746134613
Half13.11 mi0.68 mi5865+1145376+925376+92383036103610
25K15.53 mi2.42 mi5513+3525067+3095067+309420839103910
30K18.64 mi3.11 mi5326+1874891+1764891+176486544284428
20M20.00 mi1.36 mi5206+1204775+1164775+116418638253825
21M21.00 mi1.00 mi5217-114782-74782-7554247524752
35K21.75 mi0.75 mi5139+784711+714711+71367733243324
23M23.00 mi1.25 mi5107+324672+394672+39510643904390
24M24.00 mi1.00 mi5078+294636+364636+36470440444044
40K24.85 mi0.85 mi5070+84624+124624+12598648324832
25.2M25.20 mi0.35 mi5102-324644-204644-20812159455945
Finish26.22 mi1.02 mi5194-924710-664710-66991169206920

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21story building
+97ft-345ft

Overall

5496

Males

5042

M50-54

5042

5K→10K

3.1 - 6.2 mi

Top 24%
×5story building
+79ft-138ft

Overall

6818

Males

6134

M50-54

6134

10K→15K

6.2 - 9.3 mi

Top 19%
×3story building
+67ft-78ft

Overall

5496

Males

5042

M50-54

5042

15K→20K

9.3 - 12.4 mi

Top 18%
×5story building
+106ft-86ft

Overall

4997

Males

4613

M50-54

4613

20K→Half

12.4 - 13.1 mi

Top 13%
×2story building
+19ft-37ft

Overall

3830

Males

3610

M50-54

3610

Half→25K

13.1 - 15.5 mi

Top 15%
×4story building
+66ft-88ft

Overall

4208

Males

3910

M50-54

3910

25K→30K

15.5 - 18.6 mi

Top 17%
×9story building
+181ft-148ft

Overall

4865

Males

4428

M50-54

4428

30K→20M

18.6 - 20.0 mi

Top 15%
×5story building
+64ft-50ft

Overall

4186

Males

3825

M50-54

3825

20M→21M

20.0 - 21.0 mi

Top 20%
×8story building
+106ft-24ft

Overall

5542

Males

4752

M50-54

4752

21M→35K

21.0 - 21.8 mi

Top 13%
×7story building
+17ft-86ft

Overall

3677

Males

3324

M50-54

3324

35K→23M

21.8 - 23.0 mi

Top 18%
×5story building
+23ft-63ft

Overall

5106

Males

4390

M50-54

4390

23M→24M

23.0 - 24.0 mi

Top 17%
×6story building
+12ft-82ft

Overall

4704

Males

4044

M50-54

4044

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

5986

Males

4832

M50-54

4832

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

8121

Males

5945

M50-54

5945

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2story building
+22ft-21ft

Overall

9911

Males

6920

M50-54

6920

Passing Analysis

Category:
Athletes Passed
2300
Passed By
731
Net Change
+1569
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6763
5K → 10K193201-8#6763#6771
10K → 15K43218+414#6771#6357
15K → 20K3868+378#6357#5979
20K → Half1151+114#5979#5865
Half → 25K3575+352#5865#5513
25K → 30K25669+187#5513#5326
30K → 20M13717+120#5326#5206
20M → 21M8495-11#5206#5217
21M → 35K868+78#5217#5139
35K → 23M9967+32#5139#5107
23M → 24M7041+29#5107#5078
24M → 40K5244+8#5078#5070
40K → 25.2M1446-32#5070#5102
25.2M → Finish19111-92#5102#5194
TOTALS2300731+1569

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