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BOSTON MARATHON 2025

Nathaniel Olson

Bib: 7486•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 45%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 48%
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
21:18
Rank: #6751
Start → 5K
21:18 | 6:51/mi
10K· 6.21 mi
43:09
Rank: #7471 (-720)
5K → 10K
21:51 | 7:02/mi
15K· 9.32 mi
1:05:01
Rank: #7598 (-127)
10K → 15K
21:52 | 7:02/mi
20K· 12.43 mi
1:27:25
Rank: #7721 (-123)
15K → 20K
22:24 | 7:13/mi
Half· 13.11 mi
1:32:13
Rank: #7715 (+6)
20K → Half
4:48 | 7:02/mi
25K· 15.53 mi
1:49:36
Rank: #7622 (+93)
Half → 25K
17:23 | 7:10/mi
30K· 18.64 mi
2:14:15
Rank: #8031 (-409)
25K → 30K
24:39 | 7:56/mi
20M
2:27:43
Rank: #9273 (-1242)
30K → 20M
13:28 | 9:55/mi
21M
2:37:14
Rank: #9706 (-433)
20M → 21M
9:31 | 9:31/mi
35K· 21.75 mi
2:44:14
Rank: #10196 (-490)
21M → 35K
7:00 | 9:21/mi
23M
2:56:13
Rank: #10830 (-634)
35K → 23M
11:59 | 9:34/mi
24M
3:06:59
Rank: #11780 (-950)
23M → 24M
10:46 | 10:46/mi
40K· 24.85 mi
3:16:11
Rank: #12424 (-644)
24M → 40K
9:12 | 10:46/mi
25.2M
3:20:06
Rank: #12675 (-251)
40K → 25.2M
3:55 | 11:21/mi
Finish· 26.22 mi
3:28:46
Rank: #12833 (-158)
25.2M → Finish
8:40 | 8:30/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:32:13
Pace7:02 /mi
2nd Half
Distance13.11 mi
Time1:56:33
Pace8:53 /mi
📊Positive Split: 26.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:2721:186:5121:18
6:51
-
10K
6.21 mi10:49:1843:096:5721:51
7:02
+0:11
15K
9.32 mi11:11:101:05:016:5921:52
7:02
0:00
20K
12.43 mi11:33:341:27:257:0222:24
7:13
+0:11
Half
13.11 mi11:38:221:32:137:024:48
7:02
-0:11
25K
15.53 mi11:55:451:49:367:0317:23
7:10
+0:08
30K
18.64 mi12:20:242:14:157:1224:39
7:56
+0:46
20M
20.00 mi12:33:522:27:437:2313:28
9:55
+1:59
21M
21.00 mi12:43:232:37:147:299:31
9:31
-0:24
35K
21.75 mi12:50:232:44:147:337:00
9:21
-0:10
23M
23.00 mi13:02:222:56:137:4011:59
9:34
+0:13
24M
24.00 mi13:13:083:06:597:4710:46
10:46
+1:12
40K
24.85 mi13:22:203:16:117:549:12
10:46
0:00
25.2M
25.20 mi13:26:153:20:067:563:55
11:21
+0:35
Finish
26.22 mi13:34:553:28:467:588:40
8:30
-2:51

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

6:51 /mi

Average Pace

7:58 /mi

Slowest Pace

11:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:49:36

52% of race

Time at Steady Pace

33:19

16% of race

Time at Slower Pace

1:05:51

32% of race

Average Pace: 7:58 /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 mi10:27:2721:186:5121:18
6:51
#6751
10K
6.21 mi10:49:1843:096:5721:51
7:02
#7471
15K
9.32 mi11:11:101:05:016:5921:52
7:02
#7598
20K
12.43 mi11:33:341:27:257:0222:24
7:13
#7721
Half
13.11 mi11:38:221:32:137:024:48
7:02
#7715
25K
15.53 mi11:55:451:49:367:0317:23
7:10
#7622
30K
18.64 mi12:20:242:14:157:1224:39
7:56
#8031
20M
20.00 mi12:33:522:27:437:2313:28
9:55
#9273
21M
21.00 mi12:43:232:37:147:299:31
9:31
#9706
35K
21.75 mi12:50:232:44:147:337:00
9:21
#10196
23M
23.00 mi13:02:222:56:137:4011:59
9:34
#10830
24M
24.00 mi13:13:083:06:597:4710:46
10:46
#11780
40K
24.85 mi13:22:203:16:117:549:12
10:46
#12424
25.2M
25.20 mi13:26:153:20:067:563:55
11:21
#12675
Finish
26.22 mi13:34:553:28:467:588:40
8:30
#12833
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi6751611961197883(Top 28%)6875(Top 43%)6875(Top 306%)
10K6.21 mi3.10 mi7471-7206635-5166635-5168168(Top 29%)7081(Top 44%)7081(Top 315%)
15K9.32 mi3.11 mi7598-1276708-736708-737883(Top 28%)6875(Top 43%)6875(Top 306%)
20K12.43 mi3.11 mi7721-1236780-726780-728291(Top 29%)7045(Top 44%)7045(Top 314%)
Half13.11 mi0.68 mi7715+66775+56775+57854(Top 28%)6816(Top 42%)6816(Top 303%)
25K15.53 mi2.42 mi7622+936691+846691+847398(Top 26%)6383(Top 40%)6383(Top 284%)
30K18.64 mi3.11 mi8031-4096886-1956886-19510904(Top 38%)8150(Top 51%)8150(Top 363%)
20M20.00 mi1.36 mi9273-12427587-7017587-70120627(Top 73%)12415(Top 77%)12415(Top 553%)
21M21.00 mi1.00 mi9706-4337797-2107797-21016134(Top 57%)10302(Top 64%)10302(Top 458%)
35K21.75 mi0.75 mi10196-4908010-2138010-21319761(Top 70%)11845(Top 74%)11845(Top 527%)
23M23.00 mi1.25 mi10830-6348282-2728282-27218963(Top 67%)11417(Top 71%)11417(Top 508%)
24M24.00 mi1.00 mi11780-9508690-4088690-40823472(Top 83%)13540(Top 84%)13540(Top 603%)
40K24.85 mi0.85 mi12424-6448977-2878977-28722572(Top 79%)13022(Top 81%)13022(Top 580%)
25.2M25.20 mi0.35 mi12675-2519080-1039080-10321623(Top 76%)12580(Top 78%)12580(Top 560%)
Finish26.22 mi1.02 mi12833-1589130-509130-5016222(Top 57%)10030(Top 62%)10030(Top 446%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21stories
+97ft-345ft

Overall

7883

Males

6875

M40-44

6875

5K→10K

3.1 - 6.2 mi

Top 29%
×5stories
+79ft-138ft

Overall

8168

Males

7081

M40-44

7081

10K→15K

6.2 - 9.3 mi

Top 28%
×3stories
+67ft-78ft

Overall

7883

Males

6875

M40-44

6875

15K→20K

9.3 - 12.4 mi

Top 29%
×5stories
+106ft-86ft

Overall

8291

Males

7045

M40-44

7045

20K→Half

12.4 - 13.1 mi

Top 28%
×2stories
+19ft-37ft

Overall

7854

Males

6816

M40-44

6816

Half→25K

13.1 - 15.5 mi

Top 26%
×4stories
+66ft-88ft

Overall

7398

Males

6383

M40-44

6383

25K→30K

15.5 - 18.6 mi

Top 38%
×9stories
+181ft-148ft

Overall

10904

Males

8150

M40-44

8150

30K→20M

18.6 - 20.0 mi

Top 73%
×5stories
+64ft-50ft

Overall

20627

Males

12415

M40-44

12415

20M→21M

20.0 - 21.0 mi

Top 57%
×8stories
+106ft-24ft

Overall

16134

Males

10302

M40-44

10302

21M→35K

21.0 - 21.8 mi

Top 70%
×7stories
+17ft-86ft

Overall

19761

Males

11845

M40-44

11845

35K→23M

21.8 - 23.0 mi

Top 67%
×5stories
+23ft-63ft

Overall

18963

Males

11417

M40-44

11417

23M→24M

23.0 - 24.0 mi

Top 83%
×6stories
+12ft-82ft

Overall

23472

Males

13540

M40-44

13540

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

22572

Males

13022

M40-44

13022

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

21623

Males

12580

M40-44

12580

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2stories
+22ft-21ft

Overall

16222

Males

10030

M40-44

10030

Passing Analysis

Category:
Athletes Passed
619
Passed By
6699
Net Change
-6082
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6751
5K → 10K36756-720#6751#7471
10K → 15K105232-127#7471#7598
15K → 20K98221-123#7598#7721
20K → Half2822+6#7721#7715
Half → 25K16067+93#7715#7622
25K → 30K84493-409#7622#8031
30K → 20M71249-1242#8031#9273
20M → 21M17450-433#9273#9706
21M → 35K9497-490#9706#10196
35K → 23M19653-634#10196#10830
23M → 24M10960-950#10830#11780
24M → 40K9653-644#11780#12424
40K → 25.2M2253-251#12424#12675
25.2M → Finish35193-158#12675#12833
TOTALS6196699-6082
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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