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BOSTON MARATHON 2026

Leslie Althoff

Bib: 21021•F

IA

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Top 45%
Masters (Masters Women)
#0 / 6862
Top 31%
Age Group (F45-49)
#0 / 1786
Top 38%
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
24:46
3.11 mi
Rank: #16743
Start → 5K
24:46 | 7:59/mi
10K
49:35
6.21 mi
Rank: #16929 (-186)
5K → 10K
24:49 | 8:00/mi
15K
1:14:36
9.32 mi
Rank: #17093 (-164)
10K → 15K
25:01 | 8:04/mi
20K
1:39:41
12.43 mi
Rank: #16957 (+136)
15K → 20K
25:05 | 8:05/mi
HALF
1:45:05
13.11 mi
Rank: #16931 (+26)
20K → HALF
5:24 | 7:56/mi
25K
2:04:38
15.53 mi
Rank: #16734 (+197)
HALF → 25K
19:33 | 8:04/mi
30K
2:30:37
18.64 mi
Rank: #16572 (+162)
25K → 30K
25:59 | 8:22/mi
20M
2:42:13
20.00 mi
Rank: #16549 (+23)
30K → 20M
11:36 | 8:33/mi
21M
2:51:13
21.00 mi
Rank: #16484 (+65)
20M → 21M
9:00 | 9:00/mi
35K
2:57:22
21.75 mi
Rank: #16435 (+49)
21M → 35K
6:09 | 8:14/mi
23M
3:08:00
23.00 mi
Rank: #16369 (+66)
35K → 23M
10:38 | 8:30/mi
24M
3:16:20
24.00 mi
Rank: #16316 (+53)
23M → 24M
8:20 | 8:20/mi
40K
3:23:43
24.85 mi
Rank: #16296 (+20)
24M → 40K
7:23 | 8:39/mi
25.2M
3:26:49
25.20 mi
Rank: #16271 (+25)
40K → 25.2M
3:06 | 9:00/mi
FINISH
3:34:52
26.22 mi
Rank: #16194 (+77)
25.2M → FINISH
8:03 | 7:54/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:45:05
Pace8:01 /mi
2nd Half
Distance13.11 mi
Time1:49:47
Pace8:23 /mi
📊Positive Split: 4.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:11:1224:467:5924:46
7:59
-
10K
6.21 mi11:36:0149:357:5924:49
8:00
+0:01
15K
9.32 mi12:01:021:14:368:0125:01
8:04
+0:04
20K
12.43 mi12:26:071:39:418:0225:05
8:05
+0:01
HALF
13.11 mi12:31:311:45:058:015:24
7:56
-0:09
25K
15.53 mi12:51:042:04:388:0219:33
8:04
+0:08
30K
18.64 mi13:17:032:30:378:0525:59
8:22
+0:18
20M
20.00 mi13:28:392:42:138:0711:36
8:33
+0:11
21M
21.00 mi13:37:392:51:138:109:00
9:00
+0:27
35K
21.75 mi13:43:482:57:228:106:09
8:14
-0:46
23M
23.00 mi13:54:263:08:008:1110:38
8:30
+0:16
24M
24.00 mi14:02:463:16:208:118:20
8:20
-0:10
40K
24.85 mi14:10:093:23:438:127:23
8:39
+0:19
25.2M
25.20 mi14:13:153:26:498:133:06
9:00
+0:21
FINISH
26.22 mi14:21:183:34:528:138:03
7:54
-1:06

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

7:54 /mi

Average Pace

8:12 /mi

Slowest Pace

9:00 /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

3:22:46

94% of race

Time at Steady Pace

12:06

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:12 /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 mi11:11:1224:467:5924:46
7:59
#16743
10K
6.21 mi11:36:0149:357:5924:49
8:00
#16929
15K
9.32 mi12:01:021:14:368:0125:01
8:04
#17093
20K
12.43 mi12:26:071:39:418:0225:05
8:05
#16957
HALF
13.11 mi12:31:311:45:058:015:24
7:56
#16931
25K
15.53 mi12:51:042:04:388:0219:33
8:04
#16734
30K
18.64 mi13:17:032:30:378:0525:59
8:22
#16572
20M
20.00 mi13:28:392:42:138:0711:36
8:33
#16549
21M
21.00 mi13:37:392:51:138:109:00
9:00
#16484
35K
21.75 mi13:43:482:57:228:106:09
8:14
#16435
23M
23.00 mi13:54:263:08:008:1110:38
8:30
#16369
24M
24.00 mi14:02:463:16:208:118:20
8:20
#16316
40K
24.85 mi14:10:093:23:438:127:23
8:39
#16296
25.2M
25.20 mi14:13:153:26:498:133:06
9:00
#16271
FINISH
26.22 mi14:21:183:34:528:138:03
7:54
#16194
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi167435768576817391(Top 60%)6127(Top 49%)6127(Top 343%)
10K6.21 mi3.10 mi16929-1865891-1235891-12317155(Top 59%)6002(Top 48%)6002(Top 336%)
15K9.32 mi3.11 mi17093-1645986-955986-9517391(Top 60%)6127(Top 49%)6127(Top 343%)
20K12.43 mi3.11 mi16957+1365908+785908+7816677(Top 57%)5753(Top 46%)5753(Top 322%)
HALF13.11 mi0.68 mi16931+265895+135895+1316591(Top 57%)5683(Top 45%)5683(Top 318%)
25K15.53 mi2.42 mi16734+1975785+1105785+11015888(Top 55%)5359(Top 43%)5359(Top 300%)
30K18.64 mi3.11 mi16572+1625743+425743+4216044(Top 55%)5541(Top 44%)5541(Top 310%)
20M20.00 mi1.36 mi16549+235735+85735+816452(Top 57%)5889(Top 47%)5889(Top 330%)
21M21.00 mi1.00 mi16484+655708+275708+2716145(Top 56%)5766(Top 46%)5766(Top 323%)
35K21.75 mi0.75 mi16435+495691+175691+1715977(Top 55%)5739(Top 46%)5739(Top 321%)
23M23.00 mi1.25 mi16369+665686+55686+515717(Top 54%)5679(Top 45%)5679(Top 318%)
24M24.00 mi1.00 mi16316+535681+55681+515935(Top 55%)5864(Top 47%)5864(Top 328%)
40K24.85 mi0.85 mi16296+205687-65687-616497(Top 57%)6247(Top 50%)6247(Top 350%)
25.2M25.20 mi0.35 mi16271+255686+15686+114739(Top 51%)5308(Top 42%)5308(Top 297%)
FINISH26.22 mi1.02 mi16194+775656+305656+3014534(Top 50%)5204(Top 41%)5204(Top 291%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21
+97ft-345ft

Overall

17391

Females

6127

F45-49

6127

5K→10K

3.1 - 6.2 mi

Top 59%
×5
+79ft-138ft

Overall

17155

Females

6002

F45-49

6002

10K→15K

6.2 - 9.3 mi

Top 60%
×3
+67ft-78ft

Overall

17391

Females

6127

F45-49

6127

15K→20K

9.3 - 12.4 mi

Top 57%
×5
+106ft-86ft

Overall

16677

Females

5753

F45-49

5753

20K→HALF

12.4 - 13.1 mi

Top 57%
×2
+19ft-37ft

Overall

16591

Females

5683

F45-49

5683

HALF→25K

13.1 - 15.5 mi

Top 55%
×4
+66ft-88ft

Overall

15888

Females

5359

F45-49

5359

25K→30K

15.5 - 18.6 mi

Top 55%
×9
+181ft-148ft

Overall

16044

Females

5541

F45-49

5541

30K→20M

18.6 - 20.0 mi

Top 57%
×5
+64ft-50ft

Overall

16452

Females

5889

F45-49

5889

20M→21M

20.0 - 21.0 mi

Top 56%
×8
+106ft-24ft

Overall

16145

Females

5766

F45-49

5766

21M→35K

21.0 - 21.8 mi

Top 55%
×7
+17ft-86ft

Overall

15977

Females

5739

F45-49

5739

35K→23M

21.8 - 23.0 mi

Top 54%
×5
+23ft-63ft

Overall

15717

Females

5679

F45-49

5679

23M→24M

23.0 - 24.0 mi

Top 55%
×6
+12ft-82ft

Overall

15935

Females

5864

F45-49

5864

24M→40K

24.0 - 24.9 mi

Top 57%
×1
+6ft-20ft

Overall

16497

Females

6247

F45-49

6247

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1
+13ft-16ft

Overall

14739

Females

5308

F45-49

5308

25.2M→FINISH

25.2 - 26.2 mi

Top 50%
×2
+22ft-21ft

Overall

14534

Females

5204

F45-49

5204

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1877*
Passed By
1051
Net Change
+549
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16743
5K → 10K200200-186#16743#16929
10K → 15K127200-164#16929#17093
15K → 20K243*107+136#17093#16957
20K → HALF4721+26#16957#16931
HALF → 25K239*42+197#16931#16734
25K → 30K277*115+162#16734#16572
30K → 20M9067+23#16572#16549
20M → 21M12863+65#16549#16484
21M → 35K8738+49#16484#16435
35K → 23M12761+66#16435#16369
23M → 24M9845+53#16369#16316
24M → 40K7454+20#16316#16296
40K → 25.2M3813+25#16296#16271
25.2M → FINISH10225+77#16271#16194
TOTALS1877*1051+549

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing