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BOSTON MARATHON 2025

Freek Van Kasteren

Bib: 28922•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:09
Rank: #23847
Start → 5K
9:23/mi
29:09 split
10K· 6.21 mi
57:29
Rank: #23382 (+465)
5K → 10K
9:07/mi
28:20 split
15K· 9.32 mi
1:25:45
Rank: #23113 (+269)
10K → 15K
9:06/mi
28:16 split
20K· 12.43 mi
1:56:41
Rank: #23429 (-316)
15K → 20K
9:57/mi
30:56 split
Half· 13.11 mi
2:03:04
Rank: #23401 (+28)
20K → Half
9:21/mi
6:23 split
25K· 15.53 mi
2:26:12
Rank: #23157 (+244)
Half → 25K
9:32/mi
23:08 split
30K· 18.64 mi
2:59:13
Rank: #23127 (+30)
25K → 30K
10:38/mi
33:01 split
20M
3:13:20
Rank: #23053 (+74)
30K → 20M
10:23/mi
14:07 split
21M
3:25:02
Rank: #23052 (+1)
20M → 21M
11:42/mi
11:42 split
35K· 21.75 mi
3:32:46
Rank: #23027 (+25)
21M → 35K
10:20/mi
7:44 split
23M
3:46:01
Rank: #22978 (+49)
35K → 23M
10:35/mi
13:15 split
24M
3:59:45
Rank: #23354 (-376)
23M → 24M
13:44/mi
13:44 split
40K· 24.85 mi
4:09:15
Rank: #23329 (+25)
24M → 40K
11:07/mi
9:30 split
25.2M
4:13:46
Rank: #23377 (-48)
40K → 25.2M
13:06/mi
4:31 split
Finish· 26.22 mi
4:24:44
Rank: #23465 (-88)
25.2M → Finish
10:46/mi
10:58 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:03:04
Pace9:23 /mi
2nd Half
Distance13.11 mi
Time2:21:40
Pace10:48 /mi
📊Positive Split: 15.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:4729:099:2329:09
9:23
-
10K
6.21 mi12:17:0757:299:1528:20
9:07
-0:16
15K
9.32 mi12:45:231:25:459:1228:16
9:06
-0:01
20K
12.43 mi13:16:191:56:419:2330:56
9:57
+0:51
Half
13.11 mi13:22:422:03:049:236:23
9:21
-0:36
25K
15.53 mi13:45:502:26:129:2523:08
9:32
+0:11
30K
18.64 mi14:18:512:59:139:3733:01
10:38
+1:06
20M
20.00 mi14:32:583:13:209:4014:07
10:23
-0:15
21M
21.00 mi14:44:403:25:029:4611:42
11:42
+1:19
35K
21.75 mi14:52:243:32:469:477:44
10:20
-1:22
23M
23.00 mi15:05:393:46:019:5013:15
10:35
+0:15
24M
24.00 mi15:19:233:59:459:5913:44
13:44
+3:09
40K
24.85 mi15:28:534:09:1510:029:30
11:07
-2:37
25.2M
25.20 mi15:33:244:13:4610:044:31
13:06
+1:59
Finish
26.22 mi15:44:224:24:4410:0610:58
10:46
-2:20

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

9:06 /mi

Average Pace

10:06 /mi

Slowest Pace

13:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:55:16

44% of race

Time at Steady Pace

1:50:01

42% of race

Time at Slower Pace

39:27

15% of race

Average Pace: 10:06 /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 mi11:48:4729:099:2329:09
9:23
#23847
10K
6.21 mi12:17:0757:299:1528:20
9:07
#23382
15K
9.32 mi12:45:231:25:459:1228:16
9:06
#23113
20K
12.43 mi13:16:191:56:419:2330:56
9:57
#23429
Half
13.11 mi13:22:422:03:049:236:23
9:21
#23401
25K
15.53 mi13:45:502:26:129:2523:08
9:32
#23157
30K
18.64 mi14:18:512:59:139:3733:01
10:38
#23127
20M
20.00 mi14:32:583:13:209:4014:07
10:23
#23053
21M
21.00 mi14:44:403:25:029:4611:42
11:42
#23052
35K
21.75 mi14:52:243:32:469:477:44
10:20
#23027
23M
23.00 mi15:05:393:46:019:5013:15
10:35
#22978
24M
24.00 mi15:19:233:59:459:5913:44
13:44
#23354
40K
24.85 mi15:28:534:09:1510:029:30
11:07
#23329
25.2M
25.20 mi15:33:244:13:4610:044:31
13:06
#23377
Finish
26.22 mi15:44:224:24:4410:0610:58
10:46
#23465
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi23847141681416822448(Top 79%)13588(Top 84%)13588(Top 605%)
10K6.21 mi3.10 mi23382+46513962+20613962+20622891(Top 81%)13765(Top 85%)13765(Top 613%)
15K9.32 mi3.11 mi23113+26913858+10413858+10422448(Top 79%)13588(Top 84%)13588(Top 605%)
20K12.43 mi3.11 mi23429-31614009-15114009-15124135(Top 85%)14285(Top 89%)14285(Top 636%)
Half13.11 mi0.68 mi23401+2813997+1213997+1223128(Top 81%)13847(Top 86%)13847(Top 616%)
25K15.53 mi2.42 mi23157+24413872+12513872+12521999(Top 77%)13294(Top 83%)13294(Top 592%)
30K18.64 mi3.11 mi23127+3013807+6513807+6523218(Top 82%)13711(Top 85%)13711(Top 610%)
20M20.00 mi1.36 mi23053+7413750+5713750+5722113(Top 78%)13098(Top 81%)13098(Top 583%)
21M21.00 mi1.00 mi23052+113738+1213738+1223017(Top 81%)13452(Top 84%)13452(Top 599%)
35K21.75 mi0.75 mi23027+2513711+2713711+2722789(Top 80%)13300(Top 83%)13300(Top 592%)
23M23.00 mi1.25 mi22978+4913668+4313668+4322216(Top 78%)12986(Top 81%)12986(Top 578%)
24M24.00 mi1.00 mi23354-37613825-15713825-15727481(Top 97%)15538(Top 96%)15538(Top 691%)
40K24.85 mi0.85 mi23329+2513796+2913796+2923383(Top 82%)13436(Top 83%)13436(Top 598%)
25.2M25.20 mi0.35 mi23377-4813813-1713813-1725176(Top 89%)14329(Top 89%)14329(Top 638%)
Finish26.22 mi1.02 mi23465-8813834-2113834-2124873(Top 88%)14209(Top 88%)14209(Top 632%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21story building
+97ft-345ft

Overall

22448

Males

13588

M40-44

13588

5K→10K

3.1 - 6.2 mi

Top 81%
×5story building
+79ft-138ft

Overall

22891

Males

13765

M40-44

13765

10K→15K

6.2 - 9.3 mi

Top 79%
×3story building
+67ft-78ft

Overall

22448

Males

13588

M40-44

13588

15K→20K

9.3 - 12.4 mi

Top 85%
×5story building
+106ft-86ft

Overall

24135

Males

14285

M40-44

14285

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

23128

Males

13847

M40-44

13847

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

21999

Males

13294

M40-44

13294

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

23218

Males

13711

M40-44

13711

30K→20M

18.6 - 20.0 mi

Top 78%
×5story building
+64ft-50ft

Overall

22113

Males

13098

M40-44

13098

20M→21M

20.0 - 21.0 mi

Top 81%
×8story building
+106ft-24ft

Overall

23017

Males

13452

M40-44

13452

21M→35K

21.0 - 21.8 mi

Top 80%
×7story building
+17ft-86ft

Overall

22789

Males

13300

M40-44

13300

35K→23M

21.8 - 23.0 mi

Top 78%
×5story building
+23ft-63ft

Overall

22216

Males

12986

M40-44

12986

23M→24M

23.0 - 24.0 mi

Top 97%
×6story building
+12ft-82ft

Overall

27481

Males

15538

M40-44

15538

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

23383

Males

13436

M40-44

13436

40K→25.2M

24.9 - 25.2 mi

Top 89%
×1story
+13ft-16ft

Overall

25176

Males

14329

M40-44

14329

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

24873

Males

14209

M40-44

14209

Passing Analysis

Category:
Athletes Passed
1875
Passed By
1493
Net Change
+382
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23847
5K → 10K54277+465#23847#23382
10K → 15K33768+269#23382#23113
15K → 20K81397-316#23113#23429
20K → Half4618+28#23429#23401
Half → 25K26521+244#23401#23157
25K → 30K188158+30#23157#23127
30K → 20M10733+74#23127#23053
20M → 21M6968+1#23053#23052
21M → 35K5126+25#23052#23027
35K → 23M9142+49#23027#22978
23M → 24M11387-376#22978#23354
24M → 40K5934+25#23354#23329
40K → 25.2M1159-48#23329#23377
25.2M → Finish17105-88#23377#23465
TOTALS18751493+382
📊

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