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BOSTON MARATHON 2025

Simon Thor Olsen

Bib: 7951•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 32%
Gender (Male)
#0 / 16105
Top 46%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:04
Rank: #6175
Start → 5K
21:04 | 6:47/mi
10K· 6.21 mi
42:07
Rank: #6086 (+89)
5K → 10K
21:03 | 6:47/mi
15K· 9.32 mi
1:03:05
Rank: #5903 (+183)
10K → 15K
20:58 | 6:45/mi
20K· 12.43 mi
1:24:22
Rank: #5844 (+59)
15K → 20K
21:17 | 6:51/mi
Half· 13.11 mi
1:29:01
Rank: #5872 (-28)
20K → Half
4:39 | 6:49/mi
25K· 15.53 mi
1:45:39
Rank: #5727 (+145)
Half → 25K
16:38 | 6:52/mi
30K· 18.64 mi
2:08:00
Rank: #5717 (+10)
25K → 30K
22:21 | 7:12/mi
20M
2:18:49
Rank: #6009 (-292)
30K → 20M
10:49 | 7:58/mi
21M
2:28:42
Rank: #6580 (-571)
20M → 21M
9:53 | 9:53/mi
35K· 21.75 mi
2:35:11
Rank: #6886 (-306)
21M → 35K
6:29 | 8:40/mi
23M
2:46:17
Rank: #7321 (-435)
35K → 23M
11:06 | 8:52/mi
24M
2:56:06
Rank: #8012 (-691)
23M → 24M
9:49 | 9:49/mi
40K· 24.85 mi
3:04:25
Rank: #8539 (-527)
24M → 40K
8:19 | 9:44/mi
25.2M
3:07:52
Rank: #8706 (-167)
40K → 25.2M
3:27 | 10:00/mi
Finish· 26.22 mi
3:17:03
Rank: #9222 (-516)
25.2M → Finish
9:11 | 9:01/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:01
Pace6:47 /mi
2nd Half
Distance13.11 mi
Time1:48:02
Pace8:14 /mi
📊Positive Split: 21.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:28:1721:046:4721:04
6:47
-
10K
6.21 mi10:49:2042:076:4721:03
6:47
0:00
15K
9.32 mi11:10:181:03:056:4620:58
6:45
-0:02
20K
12.43 mi11:31:351:24:226:4721:17
6:51
+0:06
Half
13.11 mi11:36:141:29:016:474:39
6:49
-0:02
25K
15.53 mi11:52:521:45:396:4816:38
6:52
+0:03
30K
18.64 mi12:15:132:08:006:5222:21
7:12
+0:20
20M
20.00 mi12:26:022:18:496:5610:49
7:58
+0:46
21M
21.00 mi12:35:552:28:427:059:53
9:53
+1:55
35K
21.75 mi12:42:242:35:117:086:29
8:40
-1:13
23M
23.00 mi12:53:302:46:177:1411:06
8:52
+0:12
24M
24.00 mi13:03:192:56:067:209:49
9:49
+0:57
40K
24.85 mi13:11:383:04:257:258:19
9:44
-0:05
25.2M
25.20 mi13:15:053:07:527:273:27
10:00
+0:16
Finish
26.22 mi13:24:163:17:037:319:11
9:01
-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

6:45 /mi

Average Pace

7:31 /mi

Slowest Pace

10:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:08:00

65% of race

Time at Steady Pace

10:49

5% of race

Time at Slower Pace

58:14

30% of race

Average Pace: 7:31 /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 mi10:28:1721:046:4721:04
6:47
#6175
10K
6.21 mi10:49:2042:076:4721:03
6:47
#6086
15K
9.32 mi11:10:181:03:056:4620:58
6:45
#5903
20K
12.43 mi11:31:351:24:226:4721:17
6:51
#5844
Half
13.11 mi11:36:141:29:016:474:39
6:49
#5872
25K
15.53 mi11:52:521:45:396:4816:38
6:52
#5727
30K
18.64 mi12:15:132:08:006:5222:21
7:12
#5717
20M
20.00 mi12:26:022:18:496:5610:49
7:58
#6009
21M
21.00 mi12:35:552:28:427:059:53
9:53
#6580
35K
21.75 mi12:42:242:35:117:086:29
8:40
#6886
23M
23.00 mi12:53:302:46:177:1411:06
8:52
#7321
24M
24.00 mi13:03:192:56:067:209:49
9:49
#8012
40K
24.85 mi13:11:383:04:257:258:19
9:44
#8539
25.2M
25.20 mi13:15:053:07:527:273:27
10:00
#8706
Finish
26.22 mi13:24:163:17:037:319:11
9:01
#9222
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi6175566556655584(Top 20%)5116(Top 32%)5116(Top 91%)
10K6.21 mi3.10 mi6086+895583+825583+826129(Top 22%)5591(Top 35%)5591(Top 99%)
15K9.32 mi3.11 mi5903+1835415+1685415+1685584(Top 20%)5116(Top 32%)5116(Top 91%)
20K12.43 mi3.11 mi5844+595357+585357+585790(Top 20%)5272(Top 33%)5272(Top 93%)
Half13.11 mi0.68 mi5872-285383-265383-266329(Top 22%)5714(Top 35%)5714(Top 101%)
25K15.53 mi2.42 mi5727+1455247+1365247+1365376(Top 19%)4904(Top 30%)4904(Top 87%)
30K18.64 mi3.11 mi5717+105213+345213+345871(Top 21%)5223(Top 32%)5223(Top 93%)
20M20.00 mi1.36 mi6009-2925425-2125425-21210145(Top 36%)7614(Top 47%)7614(Top 135%)
21M21.00 mi1.00 mi6580-5715847-4225847-42217808(Top 63%)11057(Top 69%)11057(Top 196%)
35K21.75 mi0.75 mi6886-3066058-2116058-21116419(Top 58%)10342(Top 64%)10342(Top 183%)
23M23.00 mi1.25 mi7321-4356304-2466304-24615451(Top 54%)9830(Top 61%)9830(Top 174%)
24M24.00 mi1.00 mi8012-6916704-4006704-40020758(Top 73%)12218(Top 76%)12218(Top 217%)
40K24.85 mi0.85 mi8539-5277000-2967000-29619549(Top 69%)11575(Top 72%)11575(Top 205%)
25.2M25.20 mi0.35 mi8706-1677077-777077-7716952(Top 60%)10317(Top 64%)10317(Top 183%)
Finish26.22 mi1.02 mi9222-5167334-2577334-25719092(Top 67%)11377(Top 71%)11377(Top 202%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21stories
+97ft-345ft

Overall

5584

Males

5116

M18-39

5116

5K→10K

3.1 - 6.2 mi

Top 22%
×5stories
+79ft-138ft

Overall

6129

Males

5591

M18-39

5591

10K→15K

6.2 - 9.3 mi

Top 20%
×3stories
+67ft-78ft

Overall

5584

Males

5116

M18-39

5116

15K→20K

9.3 - 12.4 mi

Top 20%
×5stories
+106ft-86ft

Overall

5790

Males

5272

M18-39

5272

20K→Half

12.4 - 13.1 mi

Top 22%
×2stories
+19ft-37ft

Overall

6329

Males

5714

M18-39

5714

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

5376

Males

4904

M18-39

4904

25K→30K

15.5 - 18.6 mi

Top 21%
×9stories
+181ft-148ft

Overall

5871

Males

5223

M18-39

5223

30K→20M

18.6 - 20.0 mi

Top 36%
×5stories
+64ft-50ft

Overall

10145

Males

7614

M18-39

7614

20M→21M

20.0 - 21.0 mi

Top 63%
×8stories
+106ft-24ft

Overall

17808

Males

11057

M18-39

11057

21M→35K

21.0 - 21.8 mi

Top 58%
×7stories
+17ft-86ft

Overall

16419

Males

10342

M18-39

10342

35K→23M

21.8 - 23.0 mi

Top 54%
×5stories
+23ft-63ft

Overall

15451

Males

9830

M18-39

9830

23M→24M

23.0 - 24.0 mi

Top 73%
×6stories
+12ft-82ft

Overall

20758

Males

12218

M18-39

12218

24M→40K

24.0 - 24.9 mi

Top 69%
×1story
+6ft-20ft

Overall

19549

Males

11575

M18-39

11575

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

16952

Males

10317

M18-39

10317

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2stories
+22ft-21ft

Overall

19092

Males

11377

M18-39

11377

Passing Analysis

Category:
Athletes Passed
1092
Passed By
4139
Net Change
-3047
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6175
5K → 10K226137+89#6175#6086
10K → 15K23653+183#6086#5903
15K → 20K15394+59#5903#5844
20K → Half1442-28#5844#5872
Half → 25K18944+145#5872#5727
25K → 30K187177+10#5727#5717
30K → 20M15307-292#5717#6009
20M → 21M9580-571#6009#6580
21M → 35K9315-306#6580#6886
35K → 23M24459-435#6886#7321
23M → 24M5696-691#7321#8012
24M → 40K9536-527#8012#8539
40K → 25.2M9176-167#8539#8706
25.2M → Finish7523-516#8706#9222
TOTALS10924139-3047
📊

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