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BOSTON MARATHON 2026

Nathaniel Buchheit

Bib: 1938•M

CO

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0:00
/ mi
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Overall
#0 / 29021
Top 19%
Gender (Male)
#0 / 16340
Top 30%
Age Group (M18-39)
#0 / 5723
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
20:19
3.11 mi
Rank: #4499
Start → 5K
20:19 | 6:33/mi
10K
40:51
6.21 mi
Rank: #4797 (-298)
5K → 10K
20:32 | 6:37/mi
15K
1:01:31
9.32 mi
Rank: #4952 (-155)
10K → 15K
20:40 | 6:40/mi
20K
1:22:11
12.43 mi
Rank: #4882 (+70)
15K → 20K
20:40 | 6:40/mi
HALF
1:26:42
13.11 mi
Rank: #4901 (-19)
20K → HALF
4:31 | 6:38/mi
25K
1:42:51
15.53 mi
Rank: #4820 (+81)
HALF → 25K
16:09 | 6:40/mi
30K
2:03:57
18.64 mi
Rank: #4691 (+129)
25K → 30K
21:06 | 6:48/mi
20M
2:13:20
20.00 mi
Rank: #4691
30K → 20M
9:23 | 6:55/mi
21M
2:20:54
21.00 mi
Rank: #4771 (-80)
20M → 21M
7:34 | 7:34/mi
35K
2:26:00
21.75 mi
Rank: #4791 (-20)
21M → 35K
5:06 | 6:50/mi
23M
2:35:06
23.00 mi
Rank: #4937 (-146)
35K → 23M
9:06 | 7:17/mi
24M
2:42:23
24.00 mi
Rank: #5079 (-142)
23M → 24M
7:17 | 7:17/mi
40K
2:48:36
24.85 mi
Rank: #5145 (-66)
24M → 40K
6:13 | 7:17/mi
25.2M
2:51:22
25.20 mi
Rank: #5203 (-58)
40K → 25.2M
2:46 | 8:02/mi
FINISH
2:58:51
26.22 mi
Rank: #5425 (-222)
25.2M → FINISH
7:29 | 7:21/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:26:42
Pace6:37 /mi
2nd Half
Distance13.11 mi
Time1:32:09
Pace7:02 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:3820:196:3320:19
6:33
-
10K
6.21 mi10:41:1040:516:3520:32
6:37
+0:04
15K
9.32 mi11:01:501:01:316:3720:40
6:40
+0:03
20K
12.43 mi11:22:301:22:116:3720:40
6:40
0:00
HALF
13.11 mi11:27:011:26:426:374:31
6:38
-0:02
25K
15.53 mi11:43:101:42:516:3816:09
6:40
+0:02
30K
18.64 mi12:04:162:03:576:3921:06
6:48
+0:08
20M
20.00 mi12:13:392:13:206:419:23
6:55
+0:07
21M
21.00 mi12:21:132:20:546:437:34
7:34
+0:39
35K
21.75 mi12:26:192:26:006:435:06
6:50
-0:44
23M
23.00 mi12:35:252:35:066:459:06
7:17
+0:27
24M
24.00 mi12:42:422:42:236:467:17
7:17
0:00
40K
24.85 mi12:48:552:48:366:486:13
7:17
0:00
25.2M
25.20 mi12:51:412:51:226:492:46
8:02
+0:45
FINISH
26.22 mi12:59:102:58:516:507:29
7:21
-0:41

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

6:33 /mi

Average Pace

6:50 /mi

Slowest Pace

8:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

40:51

23% of race

Time at Steady Pace

1:37:35

55% of race

Time at Slower Pace

40:25

23% of race

Average Pace: 6:49 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:20:3820:196:3320:19
6:33
#4499
10K
6.21 mi10:41:1040:516:3520:32
6:37
#4797
15K
9.32 mi11:01:501:01:316:3720:40
6:40
#4952
20K
12.43 mi11:22:301:22:116:3720:40
6:40
#4882
HALF
13.11 mi11:27:011:26:426:374:31
6:38
#4901
25K
15.53 mi11:43:101:42:516:3816:09
6:40
#4820
30K
18.64 mi12:04:162:03:576:3921:06
6:48
#4691
20M
20.00 mi12:13:392:13:206:419:23
6:55
#4691
21M
21.00 mi12:21:132:20:546:437:34
7:34
#4771
35K
21.75 mi12:26:192:26:006:435:06
6:50
#4791
23M
23.00 mi12:35:252:35:066:459:06
7:17
#4937
24M
24.00 mi12:42:422:42:236:467:17
7:17
#5079
40K
24.85 mi12:48:552:48:366:486:13
7:17
#5145
25.2M
25.20 mi12:51:412:51:226:492:46
8:02
#5203
FINISH
26.22 mi12:59:102:58:516:507:29
7:21
#5425
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4499423842385368(Top 18%)4969(Top 30%)4969(Top 87%)
10K6.21 mi3.10 mi4797-2984493-2554493-2555100(Top 18%)4747(Top 29%)4747(Top 83%)
15K9.32 mi3.11 mi4952-1554629-1364629-1365368(Top 18%)4969(Top 30%)4969(Top 87%)
20K12.43 mi3.11 mi4882+704565+644565+644813(Top 17%)4494(Top 28%)4494(Top 79%)
HALF13.11 mi0.68 mi4901-194584-194584-195475(Top 19%)5006(Top 31%)5006(Top 87%)
25K15.53 mi2.42 mi4820+814511+734511+734565(Top 16%)4248(Top 26%)4248(Top 74%)
30K18.64 mi3.11 mi4691+1294388+1234388+1234330(Top 15%)3997(Top 24%)3997(Top 70%)
20M20.00 mi1.36 mi46914377+114377+114893(Top 17%)4397(Top 27%)4397(Top 77%)
21M21.00 mi1.00 mi4771-804431-544431-546883(Top 24%)5693(Top 35%)5693(Top 99%)
35K21.75 mi0.75 mi4791-204444-134444-135785(Top 20%)5006(Top 31%)5006(Top 87%)
23M23.00 mi1.25 mi4937-1464557-1134557-1137223(Top 25%)5882(Top 36%)5882(Top 103%)
24M24.00 mi1.00 mi5079-1424654-974654-978429(Top 29%)6470(Top 40%)6470(Top 113%)
40K24.85 mi0.85 mi5145-664694-404694-407205(Top 25%)5711(Top 35%)5711(Top 100%)
25.2M25.20 mi0.35 mi5203-584735-414735-418391(Top 29%)6287(Top 38%)6287(Top 110%)
FINISH26.22 mi1.02 mi5425-2224894-1594894-15910154(Top 35%)7184(Top 44%)7184(Top 126%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21
+97ft-345ft

Overall

5368

Males

4969

M18-39

4969

5K→10K

3.1 - 6.2 mi

Top 18%
×5
+79ft-138ft

Overall

5100

Males

4747

M18-39

4747

10K→15K

6.2 - 9.3 mi

Top 18%
×3
+67ft-78ft

Overall

5368

Males

4969

M18-39

4969

15K→20K

9.3 - 12.4 mi

Top 17%
×5
+106ft-86ft

Overall

4813

Males

4494

M18-39

4494

20K→HALF

12.4 - 13.1 mi

Top 19%
×2
+19ft-37ft

Overall

5475

Males

5006

M18-39

5006

HALF→25K

13.1 - 15.5 mi

Top 16%
×4
+66ft-88ft

Overall

4565

Males

4248

M18-39

4248

25K→30K

15.5 - 18.6 mi

Top 15%
×9
+181ft-148ft

Overall

4330

Males

3997

M18-39

3997

30K→20M

18.6 - 20.0 mi

Top 17%
×5
+64ft-50ft

Overall

4893

Males

4397

M18-39

4397

20M→21M

20.0 - 21.0 mi

Top 24%
×8
+106ft-24ft

Overall

6883

Males

5693

M18-39

5693

21M→35K

21.0 - 21.8 mi

Top 20%
×7
+17ft-86ft

Overall

5785

Males

5006

M18-39

5006

35K→23M

21.8 - 23.0 mi

Top 25%
×5
+23ft-63ft

Overall

7223

Males

5882

M18-39

5882

23M→24M

23.0 - 24.0 mi

Top 29%
×6
+12ft-82ft

Overall

8429

Males

6470

M18-39

6470

24M→40K

24.0 - 24.9 mi

Top 25%
×1
+6ft-20ft

Overall

7205

Males

5711

M18-39

5711

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1
+13ft-16ft

Overall

8391

Males

6287

M18-39

6287

25.2M→FINISH

25.2 - 26.2 mi

Top 35%
×2
+22ft-21ft

Overall

10154

Males

7184

M18-39

7184

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
819
Passed By
1531
Net Change
-926
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4499
5K → 10K63200-298#4499#4797
10K → 15K53200-155#4797#4952
15K → 20K13262+70#4952#4882
20K → HALF1130-19#4882#4901
HALF → 25K11332+81#4901#4820
25K → 30K18152+129#4820#4691
30K → 20M54540#4691#4691
20M → 21M42122-80#4691#4771
21M → 35K3454-20#4771#4791
35K → 23M36182-146#4791#4937
23M → 24M31173-142#4937#5079
24M → 40K35101-66#5079#5145
40K → 25.2M1169-58#5145#5203
25.2M → FINISH23200-222#5203#5425
TOTALS8191531-926
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
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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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

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Export & Support

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing